- spiral steel pipe
- 2017-01-17 22:44
- Spiral seam double submerged arc welded steel pipe production F219mm-F2540mm, material; Q235, Q345, X42-X70, L245, L290,
- spiral steelpipe
- 2017-01-17 22:44
- Spiral seam double submerged arc welded steel pipe production F219mm-F2540mm, material; Q235, Q345, X42-X70, L245, L290,