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发明名称
Sealing perforations in a well casing
摘要
申请公布号
GB2003958(A)
申请公布日期
1979.03.21
申请号
GB19780033818
申请日期
1978.08.18
申请人
EXXON PROD RES CO
发明人
分类号
E21B33/068;E21B33/138;E21B43/25;E21B43/26;(IPC1-7):E21B33/13
主分类号
E21B33/068
代理机构
代理人
主权项
地址
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