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  <xsd:element abstract="true" id="sgc_statement-statement-note-3-longterm-debt-longterm-debt-details" name="statement-statement-note-3-longterm-debt-longterm-debt-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="sgc_statement-statement-note-3-longterm-debt-tables" name="statement-statement-note-3-longterm-debt-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="sgc_statement-statement-note-4-periodic-pension-expense-net-periodic-benefit-cost-details" name="statement-statement-note-4-periodic-pension-expense-net-periodic-benefit-cost-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="sgc_statement-statement-note-4-periodic-pension-expense-tables" name="statement-statement-note-4-periodic-pension-expense-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="sgc_statement-statement-note-5-net-sales-accounts-receivable-and-contract-assets-details" name="statement-statement-note-5-net-sales-accounts-receivable-and-contract-assets-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="sgc_statement-statement-note-5-net-sales-disaggregated-revenue-details" name="statement-statement-note-5-net-sales-disaggregated-revenue-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="sgc_statement-statement-note-5-net-sales-tables" name="statement-statement-note-5-net-sales-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="sgc_statement-statement-note-7-sharebased-compensation-performance-share-transactions-details" name="statement-statement-note-7-sharebased-compensation-performance-share-transactions-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="sgc_statement-statement-note-7-sharebased-compensation-restricted-stock-transactions-details" name="statement-statement-note-7-sharebased-compensation-restricted-stock-transactions-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="sgc_statement-statement-note-7-sharebased-compensation-sharedbased-compensation-expense-and-the-related-tax-benefit-details" name="statement-statement-note-7-sharebased-compensation-sharedbased-compensation-expense-and-the-related-tax-benefit-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="sgc_statement-statement-note-7-sharebased-compensation-stock-option-transactions-details" name="statement-statement-note-7-sharebased-compensation-stock-option-transactions-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="sgc_statement-statement-note-7-sharebased-compensation-stocksettled-stock-appreciation-rights-transactions-details" name="statement-statement-note-7-sharebased-compensation-stocksettled-stock-appreciation-rights-transactions-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="sgc_statement-statement-note-7-sharebased-compensation-tables" name="statement-statement-note-7-sharebased-compensation-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="sgc_statement-statement-note-9-net-income-per-share-restated-reconciliation-of-basic-and-diluted-earnings-per-share-details" name="statement-statement-note-9-net-income-per-share-restated-reconciliation-of-basic-and-diluted-earnings-per-share-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="sgc_statement-statement-note-9-net-income-per-share-restated-tables" name="statement-statement-note-9-net-income-per-share-restated-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="sgc_statement-statement-significant-accounting-policies-policies" name="statement-statement-significant-accounting-policies-policies" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
</xsd:schema>
