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Title Standard No. Implemented On
Specification for channel translating equipment used on carrier systemsGB 4577-19841985-4-1
Specification for group translating equipment used on carrier systemsGB 4576-19841985-4-1
Specification for Group Translating Equipment Used on Carrier SystemsYD/T 553-19921900-1-1
Specification for Channel Translating Equipment Used on Carrier SystemsYD/T 554-19921900-1-1
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