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发明名称
Directional drill with hydraulically extended shoe
摘要
申请公布号
US3098534(A)
申请公布日期
1963.07.23
申请号
US19600036005
申请日期
1960.06.14
申请人
FARRELL CARR WARREN;DENVER WOOD MERLIN
发明人
CARR WARREN FARRELL;WOOD MERLIN DENVER
分类号
E21B7/06;E21B7/08
主分类号
E21B7/06
代理机构
代理人
主权项
地址
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