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发明名称
Punching die
摘要
申请公布号
US2622682(A)
申请公布日期
1952.12.23
申请号
US19460673713
申请日期
1946.05.31
申请人
KOPCZYNSKI JOHN F
发明人
KOPCZYNSKI JOHN F.
分类号
B21D28/34
主分类号
B21D28/34
代理机构
代理人
主权项
地址
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