ut30b的精選

方法如下(1)旋轉波段開關，至交流電壓500V檔（V~500）&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp(2)黑表筆插入“COM”插孔，紅表筆插入“VΩmA”插孔&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp(3)手持表...