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发明名称
Mounting for rock drills
摘要
申请公布号
US1813676(A)
申请公布日期
1931.07.07
申请号
US19290354513
申请日期
1929.04.12
申请人
CHICAGO PNEUMATIC TOOL COMPANY
发明人
NELL GUSTAVE M.
分类号
E21B19/24
主分类号
E21B19/24
代理机构
代理人
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地址
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