Daiichi Koshuha Kogya Kabushiki Kaisha

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Means and method for reducing radius expansion in the bending of el...
- Patent number 4,122,697
- Issue date Oct 31, 1978
- Daiichi Koshuha Kogya Kabushiki Kaisha
- Susumu Hanyo
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...

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