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发明名称
KERNBOHRAPPARAT
摘要
申请公布号
DE69709638(D1)
申请公布日期
2002.02.21
申请号
DE19976009638
申请日期
1997.06.03
申请人
DRESSER INDUSTRIES, INC.
发明人
BARTETTE, PASCAL
分类号
E21B21/10;E21B25/00;(IPC1-7):E21B25/00
主分类号
E21B21/10
代理机构
代理人
主权项
地址
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