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经营范围
发明名称
Liner wiper plug
摘要
申请公布号
GB2315790(A)
申请公布日期
1998.02.11
申请号
GB19970015471
申请日期
1997.07.22
申请人
* BAKER HUGHES INCORPORATED
发明人
JAMES M * FRASER;STEVE * STRINGFELLOW
分类号
E21B33/05;E21B33/16;(IPC1-7):E21B33/16
主分类号
E21B33/05
代理机构
代理人
主权项
地址
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