China National Standards

China Telegraphone Industry Standards English PDF List

  •  China "Telegraphone" Industry Standards English PDF List:
    • Standard  Code Standard Title Standard Class Order
    YD/T 718-2006 Technical Requirements and Measuring Methods of Telegraphone
    录音电话机技术要求及测量方法    		 China Telecommunication Standards
    Telegraphone
    English PDF

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