4. Electric heating
  5. Metal heating
  6. Of cylinders

Yoshito Tsuyama

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Method and apparatus for manufacturing spiral pipe

Metal fusion bonding – With means to deform work – filler – or flux portion before... – Comprising means forming one-piece blank into a tubular shape
Patent

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Method for manufacturing spiral-welded steel pipe

Electric heating – Metal heating – Of cylinders
Patent

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Method of manufacturing metal pipe with longitudinally different

Metal fusion bonding – Process – With shaping
Patent

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Profile ID: LFUS-PAI-P-231322

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