4 inch LR / SR hàn Asme B16 9 khuỷu tay 30/45/180 độ bằng nhau rèn2021-12-06 11:57:18 |
ASTM A 105 Hóa chất hàn ống hàn mông2022-12-06 16:17:45 |
ASTM Butt Welded Elbow, Forged 4 Schedule 40 90 Degree Elbow2021-08-25 15:05:14 |