发布时间:2025-01-20 12:08:37
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.
ezon宜准手表质量如何经常去野外登山冲浪是否会影响手表使用和数据监测
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