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发明名称
Rock drill
摘要
申请公布号
US2350659(A)
申请公布日期
1944.06.06
申请号
US19410411524
申请日期
1941.09.19
申请人
SULLIVAN MACHINERY COMPANY
发明人
GARTIN ELMER G.
分类号
E21B19/24
主分类号
E21B19/24
代理机构
代理人
主权项
地址
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