发布时间:2025-01-20 12:10:26
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.
湖南长沙有间数字电视能收到新疆维语哈语综艺维语经济和少儿等四套节目吗
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