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发明名称
CORE CUTTER HEAD
摘要
申请公布号
EP0599954(B1)
申请公布日期
1997.12.17
申请号
EP19920917979
申请日期
1992.08.28
申请人
DRESSER INDUSTRIES INC.
发明人
DEKOSTER, CLAUDE
分类号
E21B10/02;E21B10/60;(IPC1-7):E21B10/02
主分类号
E21B10/02
代理机构
代理人
主权项
地址
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