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怎么用指针万用表测量直流电压？一是量程要对，二是表笔不要反
指针式万用表怎么测量直流电压？
MF47指针万用表使用教程，看懂这13个视频，想不会都难8/13
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App03:36指针式万用表怎么测量直流电压？
App11:54App03:16App07:30App05:41App04:01App06:59App04:14App02:31App03:37App04:10App07:16App10:34App03:36
