CNS 1145-1981 Pins for Telephone Line Insulators《架空通信线路瓷绝缘子用直螺脚总则》.pdf

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YD 5102-2010 通信线路工程设计规范.pdf

YD 5051-1997 本地网通信线路工程验收规范.pdf

YD 5102-2010 通信线路工程设计规范.pdf

YD 5137-2005 本地通信线路工程设计规范.pdf

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