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