发布时间:2025-02-01 02:59:39
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。
河南一女子闲鱼上找装修师傅新房却被装成毛坯房如何找靠谱的装修工人
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