发布时间:2025-01-20 12:13:28
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.
南京毛坯房如何出租房简装修 根据自己传统喜好还是租客最喜欢模样去装修
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