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经营范围
发明名称
Punch
摘要
申请公布号
US2315340(A)
申请公布日期
1943.03.30
申请号
US19410408075
申请日期
1941.08.23
申请人
THE MIDLAND STEEL PRODUCTS COMPANY
发明人
KNUDSEN ALEX W.
分类号
B21D28/28
主分类号
B21D28/28
代理机构
代理人
主权项
地址
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