GB/T 42321-2023具有内部电弧类别的3.6kV~40.5kV柱上安装金属封闭开关设备的附加要求国家标准
英文:Additional requirements for internal arc classified pole-mounted metal-enclosed switchgear for rated voltages above 3...
英文:Additional requirements for internal arc classified pole-mounted metal-enclosed switchgear for rated voltages above 3...