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发明名称
Method and equipment for multiple whipstock drilling and lining
摘要
申请公布号
US2211803(A)
申请公布日期
1940.08.20
申请号
US19390288844
申请日期
1939.08.07
申请人
WARBURTON WALLACE A
发明人
WARBURTON WALLACE A.
分类号
E21B7/06;E21B7/08
主分类号
E21B7/06
代理机构
代理人
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