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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...