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经营范围
发明名称
Portable electric hammer
摘要
申请公布号
US1921628(A)
申请公布日期
1933.08.08
申请号
US19320615678
申请日期
1932.06.06
申请人
MAXWELL RALPH H;WEIDLING FREDERICK J
发明人
MAXWELL RALPH H.;WEIDLING FREDERICK J.
分类号
B25D11/06;E21B1/16
主分类号
B25D11/06
代理机构
代理人
主权项
地址
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