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問題求助 關(guān)于降低銅材成本,減少導體銅用量的討論!
116
stanly 2010-05-05
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問題求助 關(guān)于異形導體(扇形,瓦形)一些參數(shù)的計算求助!參與并貢獻公式有獎!
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問題求助關(guān)于電纜導體電阻的探討
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