CHARNG JIN ENTERPRISE CO., LTD

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CHANG HWA CITY, TW

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Information Patent Application
PUNCHING METHOD PROVIDING EXTENSION EFFECT
- Publication number 20100139075
- Publication date Jun 10, 2010
- CHARNG JIN ENTERPRISE CO., LTD.
- Tung-Hung HUANG
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...

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