China National Standards

China Specification verification telephone Industry Standards English PDF List

  •  China "Specification verification telephone" Industry Standards English PDF List:
    • Standard  Code Standard Title Standard Class Order
    JJG(YD)021-1994 Specification for verification of testers of telephone dial
    		China Metrological Standards
    Specification verification telephone
    English PDF
    JJG(YD)019-1994 Specification for verification of telephone channel tester
    		China Metrological Standards
    Specification verification telephone
    English PDF

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