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经营范围
发明名称
Rock drill supporting and feeding mechanism
摘要
申请公布号
US2726065(A)
申请公布日期
1955.12.06
申请号
US19550481751
申请日期
1955.01.14
申请人
CLEVELAND ROCK DRILL DIVISION
发明人
FEUCHT JACOB E.
分类号
E21B19/084
主分类号
E21B19/084
代理机构
代理人
主权项
地址
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