发布时间:2025-02-01 03:01:22
导线截面积s=I/a。I表示电流安,a表示每平方安全承载电流安。铜线a取每平方8安,铝线4安。比如100安的电流,铜线s=100÷8=12.5平方,铝线s=100÷4=25平方。
东方cj似乎很红火但我从没到东方cj上买过东西真的有朋友口中说的那么神吗
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