发布时间:2025-01-20 12:09:28
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.
我要见一个地上式蓄水池为c25混凝土请问这样注水以后不会垮了吧
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