YD/T 841.2-2008.Plastic Pipe for Buried Communication Conduit Part 2:Solid-Wall Pipe. 1范围 YD/T 841.2...
YD通讯标准
YD通讯标准
YD通讯标准
YD/T 841.2-2016 地下通信管道用塑料管 第2部分:实壁管
YD/T 841.2-2016.Plastic duct for telecommunication underground conduit Part 2: Solid-wall duct. 1范围 ...