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经营范围
发明名称
Feeding mechanism for rock drills
摘要
申请公布号
US2025551(A)
申请公布日期
1935.12.24
申请号
US19350035442
申请日期
1935.08.09
申请人
GARDNER-DENVER COMPANY
发明人
SHEETS BARTON R.
分类号
E21B19/081
主分类号
E21B19/081
代理机构
代理人
主权项
地址
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