发布时间:2025-01-20 12:17:38
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.
新房子靠近马路噪音较多除了选材怎样布局可以提高房子的隔音水准
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