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发明名称
Method of forming a hole in the wall of a hollow workpiece
摘要
申请公布号
US3271988(A)
申请公布日期
1966.09.13
申请号
US19630275807
申请日期
1963.04.24
申请人
WAGNER ELECTRIC CORPORATION
发明人
KLINKSIEK KARL W.
分类号
B21D28/28
主分类号
B21D28/28
代理机构
代理人
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