发布时间:2025-01-20 21:10:18
挤塑聚苯板的密度和强度都要高于聚苯乙烯保温板,象同是25KG/M3的,挤塑聚苯板的表面硬度高于聚苯乙烯保温板,在工程使用时,就是利用这个区别来使用,挤塑聚苯板常用于外墙或地面上,而聚苯乙烯保温板常用于屋面或变形缝处,也有的为了减少造价,而用于外墙上,这个只要看图纸上的要求就可以,图纸上是有说明的
老师您们好请问变压器的kva怎样计算成功率kw比如50kva
2025-01-20 21:10:18 2025-01-20 21:10:18 2025-01-20 21:10:18 2025-01-20 21:10:18 2025-01-20 21:10:18 2025-01-20 21:10:18 2025-01-20 21:10:18 2025-01-20 21:10:18 2025-01-20 21:10:18 2025-01-20 21:10:18 2025-01-20 21:10:18 2025-01-20 21:10:18 2025-01-20 21:10:18 2025-01-20 21:10:18 2025-01-20 21:10:18 2025-01-20 21:10:18 2025-01-20 21:10:18 2025-01-20 21:10:18 2025-01-20 21:10:18 2025-01-20 21:10:18 2025-01-20 21:10:18 2025-01-20 21:10:18 2025-01-20 21:10:18 2025-01-20 21:10:18