发布时间:2025-01-22 12:46:00
圆管理重=(外径-壁厚)*壁厚*0.02466
如果上面的48是外径那么就是:
(48-2.5)*2.5*0.02466=2.805075
深圳三菱空调是不是假货,不是日本三菱,在淘宝介绍深圳三菱,有这个
2025-01-22 12:46:00 2025-01-22 12:46:00 2025-01-22 12:46:00 2025-01-22 12:46:00 2025-01-22 12:46:00 2025-01-22 12:46:00 2025-01-22 12:46:00 2025-01-22 12:46:00 2025-01-22 12:46:00