发布时间:2025-02-01 11:16:48
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.
前不久在木缘红木家具买了一套小叶红檀家具放在家里很漂亮的我想知道现在夏天到了该怎么保养比较好
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