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发明名称
Drilling device.
摘要
申请公布号
EP0352427(B1)
申请公布日期
1994.03.02
申请号
EP19890109334
申请日期
1989.05.24
申请人
EASTMAN TELECO COMPANY
发明人
JUERGENS, RAINER, DR.-ING.
分类号
E21B4/02;E21B25/04;(IPC1-7):E21B25/04
主分类号
E21B4/02
代理机构
代理人
主权项
地址
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