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電氣加油
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樓主  發(fā)表于: 2017-07-21 15:29
三相電路中根據元件計算 電線(xiàn) 的電流電壓的，來(lái)決定電線(xiàn)的粗細。求公式
小八哥
電話(huà)15394301768 QQ815360919 慈溪余姚
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1樓  發(fā)表于: 2017-07-24 07:40
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