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发明名称
Multiple step perforating of sheet metal
摘要
申请公布号
US3232156(A)
申请公布日期
1966.02.01
申请号
US19630333347
申请日期
1963.12.26
申请人
THE HARRINGTON & KING PERFORATING CO.
发明人
FULLER JUDSON E.
分类号
B21D28/24
主分类号
B21D28/24
代理机构
代理人
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地址
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