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    <link:label id="lab_us-gaap_ProceedsFromBankDebt_72FEBFBE95B63C74451CA0019679B520_label_en-US" xlink:label="lab_us-gaap_ProceedsFromBankDebt_72FEBFBE95B63C74451CA0019679B520" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Bank Debt</link:label>
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    <link:label id="lab_us-gaap_RepaymentsOfLongTermDebt_868B8C11327E333F7266A0019679140E_label_en-US" xlink:label="lab_us-gaap_RepaymentsOfLongTermDebt_868B8C11327E333F7266A0019679140E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Repayments of Long-term Debt</link:label>
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    <link:label id="lab_us-gaap_ProceedsFromLinesOfCredit_21D64A4A8855A5653AF6A001967966B4_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromLinesOfCredit_21D64A4A8855A5653AF6A001967966B4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from borrowings on revolving credit and accounts receivable facilities</link:label>
    <link:label id="lab_us-gaap_ProceedsFromLinesOfCredit_21D64A4A8855A5653AF6A001967966B4_label_en-US" xlink:label="lab_us-gaap_ProceedsFromLinesOfCredit_21D64A4A8855A5653AF6A001967966B4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Lines of Credit</link:label>
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    <link:label id="lab_us-gaap_RepaymentsOfLinesOfCredit_2FF69844001F60CFE46CA0019679929F_label_en-US" xlink:label="lab_us-gaap_RepaymentsOfLinesOfCredit_2FF69844001F60CFE46CA0019679929F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Repayments of Lines of Credit</link:label>
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    <link:label id="lab_trs_DeferredPurchasePriceAmountPaidthru2016_01CA31C0D20B76B71626A001967911C4_terseLabel_en-US" xlink:label="lab_trs_DeferredPurchasePriceAmountPaidthru2016_01CA31C0D20B76B71626A001967911C4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Payments for deferred purchase price</link:label>
    <link:label id="lab_trs_DeferredPurchasePriceAmountPaidthru2016_01CA31C0D20B76B71626A001967911C4_label_en-US" xlink:label="lab_trs_DeferredPurchasePriceAmountPaidthru2016_01CA31C0D20B76B71626A001967911C4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Purchase Price, Amount Paid thru 2016</link:label>
    <link:label id="lab_trs_DeferredPurchasePriceAmountPaidthru2016_01CA31C0D20B76B71626A001967911C4_documentation_en-US" xlink:label="lab_trs_DeferredPurchasePriceAmountPaidthru2016_01CA31C0D20B76B71626A001967911C4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Deferred Purchase Price, Amount Paid thru 2016</link:label>
    <link:loc xlink:href="trs-20170331.xsd#trs_DeferredPurchasePriceAmountPaidthru2016" xlink:label="loc_trs_DeferredPurchasePriceAmountPaidthru2016_01CA31C0D20B76B71626A001967911C4" xlink:type="locator" />
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    <link:label id="lab_us-gaap_PaymentsOfDebtExtinguishmentCosts_C3CE66A39AA3115DEE9EA001967A1255_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfDebtExtinguishmentCosts_C3CE66A39AA3115DEE9EA001967A1255" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Debt financing fees</link:label>
    <link:label id="lab_us-gaap_PaymentsOfDebtExtinguishmentCosts_C3CE66A39AA3115DEE9EA001967A1255_label_en-US" xlink:label="lab_us-gaap_PaymentsOfDebtExtinguishmentCosts_C3CE66A39AA3115DEE9EA001967A1255" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments of Debt Extinguishment Costs</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsOfDebtExtinguishmentCosts" xlink:label="loc_us-gaap_PaymentsOfDebtExtinguishmentCosts_C3CE66A39AA3115DEE9EA001967A1255" xlink:type="locator" />
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    <link:label id="lab_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_E26D8240A4C9AEA05C7AA001967A88BD_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_E26D8240A4C9AEA05C7AA001967A88BD" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Shares surrendered upon options and restricted stock vesting to cover taxes</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation" xlink:label="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_E26D8240A4C9AEA05C7AA001967A88BD" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ProceedsFromStockOptionsExercised_119C3D72FDA3F5D27342A001967ACFE5_label_en-US" xlink:label="lab_us-gaap_ProceedsFromStockOptionsExercised_119C3D72FDA3F5D27342A001967ACFE5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Stock Options Exercised</link:label>
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    <link:label id="lab_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_312D4F4942B15BF514A8A021ECC4A1B9_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_312D4F4942B15BF514A8A021ECC4A1B9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other financing activities</link:label>
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_99A849A55A54A235CB0AA001967A71DD_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_99A849A55A54A235CB0AA001967A71DD" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash provided by (used for) financing activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_99A849A55A54A235CB0AA001967A71DD_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_99A849A55A54A235CB0AA001967A71DD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Financing Activities</link:label>
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    <link:label id="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_476CDB1352E1FF197E16A001967A083F_totalLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_476CDB1352E1FF197E16A001967A083F" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net increase for the period</link:label>
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    <link:label id="lab_trs_SeniorSecuredTermLoanMember_9BAFAF1C588BDE34FA58A577642AD1AD_label_en-US" xlink:label="lab_trs_SeniorSecuredTermLoanMember_9BAFAF1C588BDE34FA58A577642AD1AD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Senior Secured Term Loan A [Member]</link:label>
    <link:label id="lab_trs_SeniorSecuredTermLoanMember_9BAFAF1C588BDE34FA58A577642AD1AD_documentation_en-US" xlink:label="lab_trs_SeniorSecuredTermLoanMember_9BAFAF1C588BDE34FA58A577642AD1AD" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Senior Secured Term Loan A [Member]</link:label>
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    <link:label id="lab_us-gaap_DebtInstrumentAxis_5A18AE28C628EC34B70FA577642A3318_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentAxis_5A18AE28C628EC34B70FA577642A3318" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument [Axis]</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentAxis_5A18AE28C628EC34B70FA577642A3318_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentAxis_5A18AE28C628EC34B70FA577642A3318" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument [Axis]</link:label>
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    <link:label id="lab_us-gaap_DebtInstrumentNameDomain_8D713A61FE1C1E001982A577642AA131_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentNameDomain_8D713A61FE1C1E001982A577642AA131" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Name [Domain]</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentNameDomain_8D713A61FE1C1E001982A577642AA131_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentNameDomain_8D713A61FE1C1E001982A577642AA131" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Name [Domain]</link:label>
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    <link:label id="lab_trs_BankdebtandreceivablesfacilityMember_988D079FD57EB4A00605A577642A487D_terseLabel_en-US" xlink:label="lab_trs_BankdebtandreceivablesfacilityMember_988D079FD57EB4A00605A577642A487D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">U.S. bank debt and receivables facility [Member]</link:label>
    <link:label id="lab_trs_BankdebtandreceivablesfacilityMember_988D079FD57EB4A00605A577642A487D_label_en-US" xlink:label="lab_trs_BankdebtandreceivablesfacilityMember_988D079FD57EB4A00605A577642A487D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Bank debt and receivables facility [Member]</link:label>
    <link:label id="lab_trs_BankdebtandreceivablesfacilityMember_988D079FD57EB4A00605A577642A487D_documentation_en-US" xlink:label="lab_trs_BankdebtandreceivablesfacilityMember_988D079FD57EB4A00605A577642A487D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Contractual arrangement with a lender under which borrowings can be made up to a specific amount at any point in time, and under which borrowings outstanding may be either short-term or long-term, depending upon the particulars, inside the reporting entity's home country; and, collateralized debt obligation backed by, for example, but not limited to, pledge, mortgage or other lien on the entity's assets.</link:label>
    <link:loc xlink:href="trs-20170331.xsd#trs_BankdebtandreceivablesfacilityMember" xlink:label="loc_trs_BankdebtandreceivablesfacilityMember_988D079FD57EB4A00605A577642A487D" xlink:type="locator" />
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    <link:label id="lab_trs_RevolvingCreditAndTermLoanFacilitiesMember_1BAB9A89024572712AC0A577642A22DD_terseLabel_en-US" xlink:label="lab_trs_RevolvingCreditAndTermLoanFacilitiesMember_1BAB9A89024572712AC0A577642A22DD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revolving credit and term loan facilities [Member]</link:label>
    <link:label id="lab_trs_RevolvingCreditAndTermLoanFacilitiesMember_1BAB9A89024572712AC0A577642A22DD_label_en-US" xlink:label="lab_trs_RevolvingCreditAndTermLoanFacilitiesMember_1BAB9A89024572712AC0A577642A22DD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revolving credit and term loan facilities [Member]</link:label>
    <link:label id="lab_trs_RevolvingCreditAndTermLoanFacilitiesMember_1BAB9A89024572712AC0A577642A22DD_documentation_en-US" xlink:label="lab_trs_RevolvingCreditAndTermLoanFacilitiesMember_1BAB9A89024572712AC0A577642A22DD" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Debt arrangement in which loan proceeds can continuously be obtained following repayments, but the total amount borrowed cannot exceed a specified maximum amount; as well as debt instruments with maturities ranging from five to ten years.</link:label>
    <link:loc xlink:href="trs-20170331.xsd#trs_RevolvingCreditAndTermLoanFacilitiesMember" xlink:label="loc_trs_RevolvingCreditAndTermLoanFacilitiesMember_1BAB9A89024572712AC0A577642A22DD" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DebtInstrumentLineItems_7F62BC2095B34EEEB665A577642A998C_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentLineItems_7F62BC2095B34EEEB665A577642A998C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument [Line Items]</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentLineItems_7F62BC2095B34EEEB665A577642A998C_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentLineItems_7F62BC2095B34EEEB665A577642A998C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_7F62BC2095B34EEEB665A577642A998C" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DebtInstrumentUnusedBorrowingCapacityAmount_CBA11E72787C95BE18DBA577642A5EBE_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentUnusedBorrowingCapacityAmount_CBA11E72787C95BE18DBA577642A5EBE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Unused Borrowing Capacity, Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentUnusedBorrowingCapacityAmount" xlink:label="loc_us-gaap_DebtInstrumentUnusedBorrowingCapacityAmount_CBA11E72787C95BE18DBA577642A5EBE" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DebtInstrumentPeriodicPaymentPrincipal_EE94FD1C8435AE3731ABA577642A1A34_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentPeriodicPaymentPrincipal_EE94FD1C8435AE3731ABA577642A1A34" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Periodic Payment, Principal</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentPeriodicPaymentPrincipal_EE94FD1C8435AE3731ABA577642A1A34_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentPeriodicPaymentPrincipal_EE94FD1C8435AE3731ABA577642A1A34" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Periodic Payment, Principal</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentPeriodicPaymentPrincipal" xlink:label="loc_us-gaap_DebtInstrumentPeriodicPaymentPrincipal_EE94FD1C8435AE3731ABA577642A1A34" xlink:type="locator" />
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    <link:label id="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_390FD02C830903C5D3E1A577642A329B_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_390FD02C830903C5D3E1A577642A329B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, Maximum Borrowing Capacity</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_390FD02C830903C5D3E1A577642A329B" xlink:type="locator" />
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    <link:label id="lab_us-gaap_PaymentsOfFinancingCosts_A5A726B6C355F820C232A577642AD598_terseLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfFinancingCosts_A5A726B6C355F820C232A577642AD598" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Payments of Financing Costs</link:label>
    <link:label id="lab_us-gaap_PaymentsOfFinancingCosts_A5A726B6C355F820C232A577642AD598_label_en-US" xlink:label="lab_us-gaap_PaymentsOfFinancingCosts_A5A726B6C355F820C232A577642AD598" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments of Financing Costs</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsOfFinancingCosts" xlink:label="loc_us-gaap_PaymentsOfFinancingCosts_A5A726B6C355F820C232A577642AD598" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DeferredFinanceCostsNoncurrentNet_506BE6DBDCC4937E7EE7A577642A3359_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredFinanceCostsNoncurrentNet_506BE6DBDCC4937E7EE7A577642A3359" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred Finance Costs, Noncurrent, Net</link:label>
    <link:label id="lab_us-gaap_DeferredFinanceCostsNoncurrentNet_506BE6DBDCC4937E7EE7A577642A3359_label_en-US" xlink:label="lab_us-gaap_DeferredFinanceCostsNoncurrentNet_506BE6DBDCC4937E7EE7A577642A3359" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Issuance Costs, Noncurrent, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredFinanceCostsNoncurrentNet" xlink:label="loc_us-gaap_DeferredFinanceCostsNoncurrentNet_506BE6DBDCC4937E7EE7A577642A3359" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DebtRelatedCommitmentFeesAndDebtIssuanceCosts_20551E3F627424B4DB9CA577642AED4C_terseLabel_en-US" xlink:label="lab_us-gaap_DebtRelatedCommitmentFeesAndDebtIssuanceCosts_20551E3F627424B4DB9CA577642AED4C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Related Commitment Fees and Debt Issuance Costs</link:label>
    <link:label id="lab_us-gaap_DebtRelatedCommitmentFeesAndDebtIssuanceCosts_20551E3F627424B4DB9CA577642AED4C_label_en-US" xlink:label="lab_us-gaap_DebtRelatedCommitmentFeesAndDebtIssuanceCosts_20551E3F627424B4DB9CA577642AED4C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Related Commitment Fees and Debt Issuance Costs</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtRelatedCommitmentFeesAndDebtIssuanceCosts" xlink:label="loc_us-gaap_DebtRelatedCommitmentFeesAndDebtIssuanceCosts_20551E3F627424B4DB9CA577642AED4C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtRelatedCommitmentFeesAndDebtIssuanceCosts_20551E3F627424B4DB9CA577642AED4C" xlink:to="lab_us-gaap_DebtRelatedCommitmentFeesAndDebtIssuanceCosts_20551E3F627424B4DB9CA577642AED4C" xlink:type="arc" />
    <link:label id="lab_us-gaap_WriteOffOfDeferredDebtIssuanceCost_1C5FD51BD69EAE70EBACA577642AD8C1_terseLabel_en-US" xlink:label="lab_us-gaap_WriteOffOfDeferredDebtIssuanceCost_1C5FD51BD69EAE70EBACA577642AD8C1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Write off of Deferred Debt Issuance Cost</link:label>
    <link:label id="lab_us-gaap_WriteOffOfDeferredDebtIssuanceCost_1C5FD51BD69EAE70EBACA577642AD8C1_label_en-US" xlink:label="lab_us-gaap_WriteOffOfDeferredDebtIssuanceCost_1C5FD51BD69EAE70EBACA577642AD8C1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Write off of Deferred Debt Issuance Cost</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_WriteOffOfDeferredDebtIssuanceCost" xlink:label="loc_us-gaap_WriteOffOfDeferredDebtIssuanceCost_1C5FD51BD69EAE70EBACA577642AD8C1" xlink:type="locator" />
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    <link:label id="lab_us-gaap_LineOfCreditFacilityCapacityAvailableForSpecificPurposeOtherThanForTradePurchases_EFAEA120CA3EC9694E71A577642A76C5_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityCapacityAvailableForSpecificPurposeOtherThanForTradePurchases_EFAEA120CA3EC9694E71A577642A76C5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revolving Credit Facility, Capacity Available for Foreign Revolver Loans</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LineOfCreditFacilityCapacityAvailableForSpecificPurposeOtherThanForTradePurchases" xlink:label="loc_us-gaap_LineOfCreditFacilityCapacityAvailableForSpecificPurposeOtherThanForTradePurchases_EFAEA120CA3EC9694E71A577642A76C5" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DebtInstrumentMaturityDate_7132F7D7926A6661B488A577642A0D1B_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentMaturityDate_7132F7D7926A6661B488A577642A0D1B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Maturity Date</link:label>
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    <link:label id="lab_us-gaap_DebtInstrumentFaceAmount_3E38FE6F2CD54DC3F6E6A577642A2318_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentFaceAmount_3E38FE6F2CD54DC3F6E6A577642A2318" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Face Amount</link:label>
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    <link:label id="lab_trs_NetLeverageRatio_15035D8FC73DCFC9F470A577642A8003_label_en-US" xlink:label="lab_trs_NetLeverageRatio_15035D8FC73DCFC9F470A577642A8003" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net leverage ratio</link:label>
    <link:label id="lab_trs_NetLeverageRatio_15035D8FC73DCFC9F470A577642A8003_documentation_en-US" xlink:label="lab_trs_NetLeverageRatio_15035D8FC73DCFC9F470A577642A8003" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Net leverage ratio, as defined</link:label>
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    <link:label id="lab_trs_RequiredprepaymentsundertermloanAfacility_8A2DBEF7138EF496886AA577642A12CB_documentation_en-US" xlink:label="lab_trs_RequiredprepaymentsundertermloanAfacility_8A2DBEF7138EF496886AA577642A12CB" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Required prepayments under term loan A facility</link:label>
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    <link:label id="lab_us-gaap_LineOfCredit_D61E2A1DC72B5EB0C3A2A577642AD6D7_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCredit_D61E2A1DC72B5EB0C3A2A577642AD6D7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revolving Credit Facility, Amount Outstanding</link:label>
    <link:label id="lab_us-gaap_LineOfCredit_D61E2A1DC72B5EB0C3A2A577642AD6D7_label_en-US" xlink:label="lab_us-gaap_LineOfCredit_D61E2A1DC72B5EB0C3A2A577642AD6D7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Line of Credit</link:label>
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    <link:label id="lab_trs_LongTermDebtFairValueOfParValue_F68C2FCAEF3165714552A577642A89A0_documentation_en-US" xlink:label="lab_trs_LongTermDebtFairValueOfParValue_F68C2FCAEF3165714552A577642A89A0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The fair value of long-term debt presented as a % of par value.</link:label>
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    <link:label id="lab_trs_Plan3Member_86732B08C75760A262C1A591E9DE93F5_documentation_en-US" xlink:label="lab_trs_Plan3Member_86732B08C75760A262C1A591E9DE93F5" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Equity-based compensation arrangement plan.</link:label>
    <link:loc xlink:href="trs-20170331.xsd#trs_Plan3Member" xlink:label="loc_trs_Plan3Member_86732B08C75760A262C1A591E9DE93F5" xlink:type="locator" />
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    <link:label id="lab_trs_Plan4Member_DDB9434BF19FBB070F41A591E9ED3A1E_label_en-US" xlink:label="lab_trs_Plan4Member_DDB9434BF19FBB070F41A591E9ED3A1E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Plan 4 [Member]</link:label>
    <link:label id="lab_trs_Plan4Member_DDB9434BF19FBB070F41A591E9ED3A1E_documentation_en-US" xlink:label="lab_trs_Plan4Member_DDB9434BF19FBB070F41A591E9ED3A1E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Equity-based compensation arrangement plan.</link:label>
    <link:loc xlink:href="trs-20170331.xsd#trs_Plan4Member" xlink:label="loc_trs_Plan4Member_DDB9434BF19FBB070F41A591E9ED3A1E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_trs_Plan4Member_DDB9434BF19FBB070F41A591E9ED3A1E" xlink:to="lab_trs_Plan4Member_DDB9434BF19FBB070F41A591E9ED3A1E" xlink:type="arc" />
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    <link:label id="lab_trs_Plan5Member_ACE78060BFFCEB91596EA591E9ED8345_label_en-US" xlink:label="lab_trs_Plan5Member_ACE78060BFFCEB91596EA591E9ED8345" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Plan 5 [Member]</link:label>
    <link:label id="lab_trs_Plan5Member_ACE78060BFFCEB91596EA591E9ED8345_documentation_en-US" xlink:label="lab_trs_Plan5Member_ACE78060BFFCEB91596EA591E9ED8345" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Equity-based compensation arrangement plan.</link:label>
    <link:loc xlink:href="trs-20170331.xsd#trs_Plan5Member" xlink:label="loc_trs_Plan5Member_ACE78060BFFCEB91596EA591E9ED8345" xlink:type="locator" />
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    <link:label id="lab_trs_Plan7Member_53C5F7639E18D99561A0A591E9ED7AFB_label_en-US" xlink:label="lab_trs_Plan7Member_53C5F7639E18D99561A0A591E9ED7AFB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Plan 7 [Member]</link:label>
    <link:label id="lab_trs_Plan7Member_53C5F7639E18D99561A0A591E9ED7AFB_documentation_en-US" xlink:label="lab_trs_Plan7Member_53C5F7639E18D99561A0A591E9ED7AFB" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Plan 7 [Member]</link:label>
    <link:loc xlink:href="trs-20170331.xsd#trs_Plan7Member" xlink:label="loc_trs_Plan7Member_53C5F7639E18D99561A0A591E9ED7AFB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_trs_Plan7Member_53C5F7639E18D99561A0A591E9ED7AFB" xlink:to="lab_trs_Plan7Member_53C5F7639E18D99561A0A591E9ED7AFB" xlink:type="arc" />
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    <link:label id="lab_trs_Plan8Member_4CA7611C74A00729C71BA591E9ED446F_label_en-US" xlink:label="lab_trs_Plan8Member_4CA7611C74A00729C71BA591E9ED446F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Plan 8 [Member]</link:label>
    <link:label id="lab_trs_Plan8Member_4CA7611C74A00729C71BA591E9ED446F_documentation_en-US" xlink:label="lab_trs_Plan8Member_4CA7611C74A00729C71BA591E9ED446F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Plan 8 [Member]</link:label>
    <link:loc xlink:href="trs-20170331.xsd#trs_Plan8Member" xlink:label="loc_trs_Plan8Member_4CA7611C74A00729C71BA591E9ED446F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_trs_Plan8Member_4CA7611C74A00729C71BA591E9ED446F" xlink:to="lab_trs_Plan8Member_4CA7611C74A00729C71BA591E9ED446F" xlink:type="arc" />
    <link:label id="lab_trs_ServiceBasedRestricedSharesMember_3D352385A263211B6C01A591E9EDD564_terseLabel_en-US" xlink:label="lab_trs_ServiceBasedRestricedSharesMember_3D352385A263211B6C01A591E9EDD564" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Service-based restriced shares [Member]</link:label>
    <link:label id="lab_trs_ServiceBasedRestricedSharesMember_3D352385A263211B6C01A591E9EDD564_label_en-US" xlink:label="lab_trs_ServiceBasedRestricedSharesMember_3D352385A263211B6C01A591E9EDD564" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Service-based restriced shares [Member]</link:label>
    <link:label id="lab_trs_ServiceBasedRestricedSharesMember_3D352385A263211B6C01A591E9EDD564_documentation_en-US" xlink:label="lab_trs_ServiceBasedRestricedSharesMember_3D352385A263211B6C01A591E9EDD564" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Shares that an entity has not yet issued because the agreed-upon consideration, emplooyee services, has not yet been received</link:label>
    <link:loc xlink:href="trs-20170331.xsd#trs_ServiceBasedRestricedSharesMember" xlink:label="loc_trs_ServiceBasedRestricedSharesMember_3D352385A263211B6C01A591E9EDD564" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_trs_ServiceBasedRestricedSharesMember_3D352385A263211B6C01A591E9EDD564" xlink:to="lab_trs_ServiceBasedRestricedSharesMember_3D352385A263211B6C01A591E9EDD564" xlink:type="arc" />
    <link:label id="lab_trs_PerformanceBasedRestricedSharesMember_8CB48C7094586615E6F0A591E9ED6AD8_terseLabel_en-US" xlink:label="lab_trs_PerformanceBasedRestricedSharesMember_8CB48C7094586615E6F0A591E9ED6AD8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Performance-based restriced shares [Member]</link:label>
    <link:label id="lab_trs_PerformanceBasedRestricedSharesMember_8CB48C7094586615E6F0A591E9ED6AD8_label_en-US" xlink:label="lab_trs_PerformanceBasedRestricedSharesMember_8CB48C7094586615E6F0A591E9ED6AD8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Performance-based restriced shares [Member]</link:label>
    <link:label id="lab_trs_PerformanceBasedRestricedSharesMember_8CB48C7094586615E6F0A591E9ED6AD8_documentation_en-US" xlink:label="lab_trs_PerformanceBasedRestricedSharesMember_8CB48C7094586615E6F0A591E9ED6AD8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Performance-based restriced shares award.</link:label>
    <link:loc xlink:href="trs-20170331.xsd#trs_PerformanceBasedRestricedSharesMember" xlink:label="loc_trs_PerformanceBasedRestricedSharesMember_8CB48C7094586615E6F0A591E9ED6AD8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_trs_PerformanceBasedRestricedSharesMember_8CB48C7094586615E6F0A591E9ED6AD8" xlink:to="lab_trs_PerformanceBasedRestricedSharesMember_8CB48C7094586615E6F0A591E9ED6AD8" xlink:type="arc" />
    <link:label id="lab_us-gaap_TitleOfIndividualAxis_D95BCECC5BE755968895A591E9ED9A2F_terseLabel_en-US" xlink:label="lab_us-gaap_TitleOfIndividualAxis_D95BCECC5BE755968895A591E9ED9A2F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Title of Individual [Axis]</link:label>
    <link:label id="lab_us-gaap_TitleOfIndividualAxis_D95BCECC5BE755968895A591E9ED9A2F_label_en-US" xlink:label="lab_us-gaap_TitleOfIndividualAxis_D95BCECC5BE755968895A591E9ED9A2F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Title of Individual [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_TitleOfIndividualAxis" xlink:label="loc_us-gaap_TitleOfIndividualAxis_D95BCECC5BE755968895A591E9ED9A2F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TitleOfIndividualAxis_D95BCECC5BE755968895A591E9ED9A2F" xlink:to="lab_us-gaap_TitleOfIndividualAxis_D95BCECC5BE755968895A591E9ED9A2F" xlink:type="arc" />
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    <link:label id="lab_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_6E0197E27E2347D26EEEA591E9ED5E6C_label_en-US" xlink:label="lab_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_6E0197E27E2347D26EEEA591E9ED5E6C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Relationship to Entity [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_TitleOfIndividualWithRelationshipToEntityDomain" xlink:label="loc_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_6E0197E27E2347D26EEEA591E9ED5E6C" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DirectorMember_DBDE772BF919EF8768C4A591E9ED25FF_terseLabel_en-US" xlink:label="lab_us-gaap_DirectorMember_DBDE772BF919EF8768C4A591E9ED25FF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-employee independent director [Member]</link:label>
    <link:label id="lab_us-gaap_DirectorMember_DBDE772BF919EF8768C4A591E9ED25FF_label_en-US" xlink:label="lab_us-gaap_DirectorMember_DBDE772BF919EF8768C4A591E9ED25FF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Director [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DirectorMember" xlink:label="loc_us-gaap_DirectorMember_DBDE772BF919EF8768C4A591E9ED25FF" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DeferredCompensationArrangementWithIndividualSharesIssued_347ED2D80BD15DF12BBCA591E9EDDB8F_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredCompensationArrangementWithIndividualSharesIssued_347ED2D80BD15DF12BBCA591E9EDDB8F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Restricted shares issued related to director fee deferrals</link:label>
    <link:label id="lab_us-gaap_DeferredCompensationArrangementWithIndividualSharesIssued_347ED2D80BD15DF12BBCA591E9EDDB8F_label_en-US" xlink:label="lab_us-gaap_DeferredCompensationArrangementWithIndividualSharesIssued_347ED2D80BD15DF12BBCA591E9EDDB8F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Compensation Arrangement with Individual, Shares Issued</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredCompensationArrangementWithIndividualSharesIssued" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualSharesIssued_347ED2D80BD15DF12BBCA591E9EDDB8F" xlink:type="locator" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1_6DA8C30E22DE28C9E1B3A591E9ED6BF1" xlink:type="locator" />
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    <link:label id="lab_trs_ShareBasedCompensationArrangementByShareBasedPaymentAwardIncentiveCompensationPlanThresholdTargetAwardForGrantingStockAward_08BF5D8A3443EDC5CE55A591E9ED1B52_terseLabel_en-US" xlink:label="lab_trs_ShareBasedCompensationArrangementByShareBasedPaymentAwardIncentiveCompensationPlanThresholdTargetAwardForGrantingStockAward_08BF5D8A3443EDC5CE55A591E9ED1B52" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">ICP, Threshold target for granting stock awards</link:label>
    <link:label id="lab_trs_ShareBasedCompensationArrangementByShareBasedPaymentAwardIncentiveCompensationPlanThresholdTargetAwardForGrantingStockAward_08BF5D8A3443EDC5CE55A591E9ED1B52_label_en-US" xlink:label="lab_trs_ShareBasedCompensationArrangementByShareBasedPaymentAwardIncentiveCompensationPlanThresholdTargetAwardForGrantingStockAward_08BF5D8A3443EDC5CE55A591E9ED1B52" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Incentive Compensation Plan, Threshold Target Award for Granting Stock Award</link:label>
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    <link:loc xlink:href="trs-20170331.xsd#trs_ShareBasedCompensationArrangementByShareBasedPaymentAwardIncentiveCompensationPlanThresholdTargetAwardForGrantingStockAward" xlink:label="loc_trs_ShareBasedCompensationArrangementByShareBasedPaymentAwardIncentiveCompensationPlanThresholdTargetAwardForGrantingStockAward_08BF5D8A3443EDC5CE55A591E9ED1B52" xlink:type="locator" />
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