YD/T 838.1-2003.Multicore and symmetrical pair/quad cables for digital communications Part 1: Generi...
YD通讯标准
YD通讯标准
YD通讯标准
YD/T 838.1-2016 代替 YD/T 838.1-2003 数字通信用对绞/星绞对称电缆 第1部分:总则
YD/T 838.1-2016.Multicore and symmetrical pair/quad cables for digital communications Part 1:Generic...