GB/T 19215.4-2017电气安装用电缆槽管系统第2部分:特殊要求第4节:辅助端国家标准
英文:Cable trunking and ducting systems for electrical installations—Part 2: Particular requirements—Section 4:Service pol...
英文:Cable trunking and ducting systems for electrical installations—Part 2: Particular requirements—Section 4:Service pol...