|
2024
|
Invention
|
Continuous production device and manufacturing method for spiral welded steel pipe of combined st... |
|
|
Invention
|
Large-diameter spiral welded steel pipe with composite structure wall and method for manufacturin... |
|
|
Invention
|
Large-diameter thin-wall spiral welded pipe and method for manufacturing same.
It discloses a la... |
|
|
Invention
|
Continuous edge rolling device for spiral welded steel pipe of combined structure, and manufactur... |
|
2023
|
Invention
|
Large-diameter spirally welded steel pipe with composite structural wall, and manufacturing metho... |
|
|
Invention
|
Large-diameter thin-walled spiral welded pipe and manufacturing method therefor. Disclosed are a ... |
