发布时间:2025-02-01 11:20:37
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 11:20:37请问建筑面积137平采暖面积大概956平用百诗顿或威能的冷凝炉好还是博世的全预混壁挂炉好
2025-02-01 11:20:37 2025-02-01 11:20:37 2025-02-01 11:20:37 2025-02-01 11:20:37 2025-02-01 11:20:37 2025-02-01 11:20:37 2025-02-01 11:20:37 2025-02-01 11:20:37 2025-02-01 11:20:37 2025-02-01 11:20:37 2025-02-01 11:20:37 2025-02-01 11:20:37 2025-02-01 11:20:37 2025-02-01 11:20:37 2025-02-01 11:20:37 2025-02-01 11:20:37 2025-02-01 11:20:37 2025-02-01 11:20:37 2025-02-01 11:20:37 2025-02-01 11:20:37 2025-02-01 11:20:37 2025-02-01 11:20:37 2025-02-01 11:20:37 2025-02-01 11:20:37 2025-02-01 11:20:37 2025-02-01 11:20:37 2025-02-01 11:20:37cheers 芝华仕 10518 多功能三人位沙发 享受头等舱般的舒适体验
2025-02-01 11:20:37 2025-02-01 11:20:37