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BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) | Jun. 30, 2020
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Express Test Corporation (Dormant) |  |
Ownership | 100.00% |
Trio-Tech Reliability Services (Dormant) |  |
Ownership | 100.00% |
KTS Incorporated, dba Universal Systems (Dormant) |  |
Ownership | 100.00% |
European Electronic Test Centre (Dormant) |  |
Ownership | 100.00% |
Trio-Tech International Pte. Ltd |  |
Ownership | 100.00% |
Universal (Far East) Pte. Ltd |  |
Ownership | 100.00% | [1]
Trio-Tech International (Thailand) Co. Ltd |  |
Ownership | 100.00% | [1]
Trio-Tech (Bangkok) Co. Ltd. |  |
Ownership | 100.00% | [1]
Trio-Tech (Malaysia) Sdn. Bhd. (55% owned by Trio-Tech International Pte. Ltd.) |  |
Ownership | 55.00% |
Trio-Tech (Kuala Lumpur) Sdn. Bhd. (100% owned by Trio-Tech Malaysia Sdn. Bhd.) |  |
Ownership | 55.00% |
Prestal Enterprise Sdn. Bhd. (76% owned by Trio-Tech International Pte. Ltd.) |  |
Ownership | 76.00% |
Trio-Tech (SIP) Co. Ltd. |  |
Ownership | 100.00% | [1]
Trio-Tech (Chongqing) Co. Ltd. SHI International Pte. Ltd. |  |
Ownership | 100.00% | [1]
SHI International Pte. Ltd. (55% owned by Trio-Tech International Pte. Ltd.) |  |
Ownership | 55.00% |
PT SHI Indonesia (100% owned by SHI International Pte. Ltd) |  |
Ownership | 55.00% |
Trio-Tech (Tianjin) Co. Ltd. |  |
Ownership | 100.00% | [1]
[1] | 100% owned by Trio-Tech International Pte. Ltd.

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