发布时间:2025-01-20 12:07:34
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.
电工如下图数字万用表的读数是示数所选量程单位欧还是直接读示数单位欧
2025-01-20 12:07:34 2025-01-20 12:07:34 2025-01-20 12:07:34 2025-01-20 12:07:34 2025-01-20 12:07:34 2025-01-20 12:07:34 2025-01-20 12:07:34 2025-01-20 12:07:34frederique constant 康斯登 经典系列 fc303lgs5b26 男士自动机械手表
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