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发明名称
Supporting frame for rock drills
摘要
申请公布号
US2085651(A)
申请公布日期
1937.06.29
申请号
US19360057151
申请日期
1936.01.02
申请人
THE CLEVELAND ROCK DRILL COMPANY
发明人
GREVE LOUIS W.
分类号
E21B7/02;E21D9/10
主分类号
E21B7/02
代理机构
代理人
主权项
地址
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