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发明名称
BOHRMEISSEL MIT VERBESSERTER SCHNEIDSTRUKTUR
摘要
申请公布号
AT181983(T)
申请公布日期
1999.07.15
申请号
AT19960100576T
申请日期
1996.01.16
申请人
BAKER HUGHES INCORPORATED
发明人
SCOTT, DANNY E.;GRIMES, ROBERT E.;ISBELL, MATTHEW R.
分类号
E21B10/16;E21B10/52;(IPC1-7):E21B10/16
主分类号
E21B10/16
代理机构
代理人
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