发布时间:2025-02-01 11:10:08
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.
我家的挂毛巾架子安错地方了我现在想拆了换个地方可是拆了架子墙面上的砖就会有洞破损如何补
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