YD/T 950-2008.Technical Specificaion and Testing Methods for Resistibility of Telecommunication Equi...
YD通讯标准
YD通讯标准
YD通讯标准
YD/T 950-1998 电信交换设备过电压过电流防护技术要求及试验方法
YD/T 950-1998.Technical requirements and test methods for protection against overvoltages and overcu...