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发明名称
WELL SEALING ASSEMBLY
摘要
申请公布号
GB2126629(A)
申请公布日期
1984.03.28
申请号
GB19830022015
申请日期
1983.08.16
申请人
* CAMERON IRON WORKS INC
发明人
JAMES * LEWANDOWSKI;JAMES P * MCEVER
分类号
E21B33/10;E21B33/00;E21B33/03;E21B33/04;E21B33/12;(IPC1-7):E21B33/04
主分类号
E21B33/10
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代理人
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