7
计算由不同材料管道中摩擦引起的压降。
有一系列的钢管(EN 10255:2005),铜(UNE-EN 1057:2007和ASTM-B-88),聚氯乙烯PVC-U(EN ISO 1452-2:2010)和PVC-O(UNE-ISO-ISO-ISO 16422:2008) 15876-2:2004)。October 28, 2025
October 28, 2025
October 28, 2025
October 28, 2025
October 26, 2025
October 25, 2025
October 24, 2025
October 22, 2025
October 22, 2025
October 21, 2025
October 20, 2025
October 18, 2025