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发明名称
Drilling apparatus
摘要
申请公布号
US1824479(A)
申请公布日期
1931.09.22
申请号
US19280282702
申请日期
1928.06.04
申请人
SULLIVAN MACHINERY COMPANY
发明人
GARTIN ELMER G.
分类号
B25D9/18
主分类号
B25D9/18
代理机构
代理人
主权项
地址
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