YD/T 5162-2007.Drawing Gallery of Communication Conduit Transect. 1总则 1.0.1 “通信管道横断面图集”(以下简称图集),是规范通...
YD通讯标准
YD通讯标准
YD通讯标准
YD/T 5162-2017 通信管道横断面图集
YD/T 5162-2017.Transect Drawing Gallery of Communication Conduit. 1总则 1.0.1 “通信管道横断面图集”(以下简称图集),是规范通...