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发明名称
Method and means of rotary drilling
摘要
申请公布号
US2624549(A)
申请公布日期
1953.01.06
申请号
US19470736834
申请日期
1947.03.24
申请人
WALLACE OAKIE G
发明人
WALLACE OAKIE G.
分类号
E21B17/07
主分类号
E21B17/07
代理机构
代理人
主权项
地址
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