发布时间:2025-02-01 11:14:10
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.
老家院子地面已经打了水泥层了现在想铺吸水砖就是那种人行道上防滑的那种可以铺设么
2025-02-01 11:14:10 2025-02-01 11:14:10 2025-02-01 11:14:10金河田电脑音箱功放线控插头线断坏了维修不知如何重新接线急求助
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