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发明名称
BOHRLOCHPERFORATIONSSYSTEM HOHER DICHTE
摘要
申请公布号
DE69722945(T2)
申请公布日期
2004.05.13
申请号
DE19976022945T
申请日期
1997.09.03
申请人
OWEN OIL TOOLS, INC.
发明人
WESSON, S.;PRATT, W.
分类号
E21B43/117;E21B43/1185;(IPC1-7):E21B43/117
主分类号
E21B43/117
代理机构
代理人
主权项
地址
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