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经营范围
发明名称
Rock drill feeding mechanism
摘要
申请公布号
US2086634(A)
申请公布日期
1937.07.13
申请号
US19340715149
申请日期
1934.03.12
申请人
GARDNER-DENVER COMPANY
发明人
PEARSON GUSTAV C.;CARPENTER IVAN S.
分类号
E21B19/083
主分类号
E21B19/083
代理机构
代理人
主权项
地址
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