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发明名称
A downhole tool
摘要
申请公布号
GB9818506(D0)
申请公布日期
1998.10.21
申请号
GB19980018506
申请日期
1998.08.26
申请人
DOIG, THOMAS;NICOLL, GEORGE
发明人
分类号
E21B37/00
主分类号
E21B37/00
代理机构
代理人
主权项
地址
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