发布时间:2025-01-20 12:13:55
电缆套官的型号与电缆截面相关,也与成品外径.
一般来说,电缆的截面不得大于电缆套管的内截面40%.
电缆的截面=成品外径的平方*0.7854.
电缆套官的内截面=内径的平方*0.7854.
我家是高层建筑有一面中间带大窗户的承重墙39窗下部分有钢筋想将窗下部分砸除把窗改成门口可以吗
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