发布时间:2025-02-01 11:13:34
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.
新房装修不知道采暖方面怎么弄比较划算是安装壁挂炉暖气片还是铺设地暖壁挂炉
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