TREA

Sung Gi Choe

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  • Pyongyang, KR
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  • Information Patent Grant

    Die assembly and a method of making it
    • Patent number 8,176,765
    • Issue date May 15, 2012
    • Sung Gi Choe
    • Sung Gi Choe
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...

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