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发明名称
DRILLING APPARATUS
摘要
申请公布号
GB2172324(B)
申请公布日期
1988.07.20
申请号
GB19860006518
申请日期
1986.03.17
申请人
* CAMBRIDGE RADIATION TECHNOLOGY LIMITED
发明人
GORDON * DOUGLAS;PETER * ALLEN
分类号
E21B7/06;E21B17/10;(IPC1-7):E21B7/06
主分类号
E21B7/06
代理机构
代理人
主权项
地址
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