China National Standards

China Type designation accessory Industry Standards English PDF List

  •  China "Type designation accessory" Industry Standards English PDF List:
    • Standard  Code Standard Title Standard Class Order
    YD/T 638.13-1993 Type designation for accessory equipments of telephone exchange
    电话交换附属设备型号命名方法    		 China Telecommunication Standards
    Type designation accessory
    English PDF

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