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2.5平方铜线电阻是多少_家居日记
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2.5平方铜线电阻是多少

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2.5平方铜线电阻是多少 假设铜线有100米长的话，它的电阻大概有0.7，电阻值是可以根据公式来计算的，需要知道铜线的电阻率、长度和直径，电阻率和长度相乘再除去


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