
245*50厚壁管無錫無縫鋼管能承受壓力計算方法
245*50厚壁管無錫無縫鋼管能承受壓力計算方法___0510-88264800 13376216888
| 194*20 | 219*16 | 245*45 | 299*35 | 
| 194*22 | 219*17 | 245*48 | 299*36 | 
| 194*25 | 219*18 | 245*50 | 299*38 | 
| 194*28 | 219*20 | 245*60 | 299*40 |