发布时间:2025-02-01 11:19:35
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.
我要见一个地上式蓄水池,为C25混凝土,请问这样注水以后不会垮了吧
2025-02-01 11:19:35你好我刚配的眼镜我订的是174的但从厚度来看不是没有薄了多少我想测一下折射率不知道去那测
2025-02-01 11:19:35 2025-02-01 11:19:35 2025-02-01 11:19:35 2025-02-01 11:19:35 2025-02-01 11:19:35 2025-02-01 11:19:35 2025-02-01 11:19:35 2025-02-01 11:19:35 2025-02-01 11:19:35 2025-02-01 11:19:35 2025-02-01 11:19:35 2025-02-01 11:19:35 2025-02-01 11:19:35 2025-02-01 11:19:35 2025-02-01 11:19:35 2025-02-01 11:19:35 2025-02-01 11:19:35 2025-02-01 11:19:35 2025-02-01 11:19:35 2025-02-01 11:19:35 2025-02-01 11:19:35 2025-02-01 11:19:35 2025-02-01 11:19:35 2025-02-01 11:19:35 2025-02-01 11:19:35 2025-02-01 11:19:35 2025-02-01 11:19:35