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建筑群施工工地的电气设备较多,如果单台电机都做接地极,会使材料及人力浪费,特别是土质电性能差的地方更为严重。我们对6
There are many electrical devices in the construction site of the building group. If a single motor is used as a grounding electrode, the material and manpower will be wasted, especially where the electrical properties of the soil are poor. We have 6