China National Standards

China Communication Conduit Passage Industry Standards English PDF List

  •  China "Communication Conduit Passage" Industry Standards English PDF List:
    • Standard  Code Standard Title Standard Class Order
    YD 5007-2003 Communication Conduit and Passage Engineering Designing Standard
    通信管道与通道工程设计规范    		 China Telecommunication Standards
    Communication Conduit Passage
    English PDF

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