你知道电池的负极是接地的,你怎样判断地线和正负的?
你要量量各极与地线的电阻
所有跟帖:
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正对负有电压,地对负极0电阻,地对其它电阻无穷大
-ddy-
♂
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03/16/2019 postreply
10:58:19
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Your best bet is to look at the wiring at the pump
-MoonRiverMe-
♂
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03/16/2019 postreply
11:39:33