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发明名称
DATAOVERFOERING I BOREHULL
摘要
申请公布号
NO931149(D0)
申请公布日期
1993.03.26
申请号
NO19930001149
申请日期
1993.03.26
申请人
METROL TECH LTD
发明人
SMITH DAVID BALFOUR
分类号
E21B47/16;G08C23/02;(IPC1-7):E21B/
主分类号
E21B47/16
代理机构
代理人
主权项
地址
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