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发明名称
EARTH DRILLING APPARATUS AND METHOD
摘要
申请公布号
EP0100230(A3)
申请公布日期
1985.05.15
申请号
EP19830304298
申请日期
1983.07.25
申请人
DICKINSON, BEN WADE OAKES, III;DICKINSON, ROBERT WAYNE
发明人
DICKINSON III, BEN WADE OAKES;DICKINSON, ROBERT WAYNE;HUTCHISON, STANLEY O.;MAY, SHERMAN C.;MACKEY, CHARLES S.
分类号
E21B7/06;E21B7/08;E21B7/18;E21B17/042;E21B17/07;E21B36/00;E21B43/28;E21B44/00;(IPC1-7):E21B7/08;E21B43/24
主分类号
E21B7/06
代理机构
代理人
主权项
地址
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