YD/T 1113-2001.Characteristics of Low - Smoke Halogen - Free and Flame Retardant Compound for Optica...
YD通讯标准
YD通讯标准
YD通讯标准
YD/T 1113-2015 通信电缆光缆用无卤低烟阻燃材料
YD/T 1113-2015.Low-smoke halogen-free compounds for telecommunication cable and optical fiber cable....