YD/T 926.2-2001.Telecommunication Generic Cabling System for Building Part 2: Cable Requirements for...
YD通讯标准
YD通讯标准
YD通讯标准
YD/T 926.2-2009 大楼通信综合布线系统 第2部分:电缆、光缆技术要求
YD/T 926.2-2009.Telecommunication Generic Cabling System for Building Part 2: Cable requirements. 1范...