发布时间:2025-01-20 12:06:37
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.
苹果7p更新完手机系统后大部分软件都打不开然后闪退卸载重装也不行
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