发布时间:2025-01-20 11:54:30
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.
604027的草缸准备养孔雀想布景求大神指点地沙铺什么好想变成海底深蓝那种
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