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发明名称
DRILLING SIGNALLING SYSTEM
摘要
申请公布号
EP1354127(A1)
申请公布日期
2003.10.22
申请号
EP20020716144
申请日期
2002.01.22
申请人
GEOLINK(UK) LIMITED
发明人
INNES, FRANK
分类号
E21B47/18;(IPC1-7):E21B47/18
主分类号
E21B47/18
代理机构
代理人
主权项
地址
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