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发明名称
Mounting for rock drills
摘要
申请公布号
US2088649(A)
申请公布日期
1937.08.03
申请号
US19350008830
申请日期
1935.03.01
申请人
INGERSOLL-RAND COMPANY
发明人
HART DUDLEY W.
分类号
E21B15/04
主分类号
E21B15/04
代理机构
代理人
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