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发明名称
FREMGANGSMAATE OG KJERNEBOR TIL VIDERE BORING AV BOREHULL I UNDERJORDISKE BERGFORMASJONER.
摘要
申请公布号
NO900458(D0)
申请公布日期
1990.01.31
申请号
NO19900000458
申请日期
1990.01.31
申请人
EASTMAN CHRISTENSEN COMPANY
发明人
JUERGENS, RAINER;ES, JOHANN VAN
分类号
E21B4/02;E21B7/06;E21B25/04;E21B25/16;(IPC1-7):E21B/
主分类号
E21B4/02
代理机构
代理人
主权项
地址
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