标准查询 标准查询建筑物电气安装.第5-53部分:电气设备的选择和安装.绝缘、开关和控制
Electrical installations of buildings－Part 5－53：Selection and erection of electrical equipment－Isolation, switching and control
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标准查询Electrical installations of buildings－Part 5－53：Selection and erection of electrical equipment－Isolation, switching and control
