GB/T 34130.21-2017电源母线系统第21部分:用于墙壁和天花板安装的电源母线系统的特殊要求国家标准
英文:Powertrack systems—Part 21: Particular requirements for powertrack systems intended for wall and ceiling mounting GB/...
英文:Powertrack systems—Part 21: Particular requirements for powertrack systems intended for wall and ceiling mounting GB/...