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发明名称
Mounting for rock drills
摘要
申请公布号
US1747869(A)
申请公布日期
1930.02.18
申请号
US19270163164
申请日期
1927.01.24
申请人
INGERSOLL-RAND COMPANY
发明人
HANSEN CHARLES C.
分类号
E21B15/00;E21B15/04;E21B19/08
主分类号
E21B15/00
代理机构
代理人
主权项
地址
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