Masao Nakamura

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Aichi, JP

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Device and method for forming bent pipe of non-annular cross-section
- Patent number 5,586,462
- Issue date Dec 24, 1996
- Aisin Seiki Kabushiki Kaisha
- Kiyoshi Takeuchi
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...

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