A.200mm B.250mm C.300mm D.400mm
A.0.1 B.0.5 C.1 D.2
A.直流电阻 B.接地电阻 C.绝缘电阻 D.分流电阻
A.比较臂 B.检流计 C.比率臂 D.电源按钮
A.单臂电桥 B.绝缘电阻表 C.双臂电桥 D.接地电阻测试仪
