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发明名称
Drilling apparatus
摘要
申请公布号
GB2343951(B)
申请公布日期
2003.05.14
申请号
GB19980025434
申请日期
1998.11.20
申请人
* THOMSON MARCONI SONAR LIMITED
发明人
M R * EATON
分类号
E21B47/12;G01V1/42;(IPC1-7):G01V1/42
主分类号
E21B47/12
代理机构
代理人
主权项
地址
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