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发明名称
St°ttehylse for foringsr°rkutterblad
摘要
申请公布号
NO992600(D0)
申请公布日期
1999.05.31
申请号
NO19990002600
申请日期
1999.05.31
申请人
BAKER HUGHES INC
发明人
LYNDE, GERALD DAVID;DAVIS, JOHN P.
分类号
E21B29/00;(IPC1-7):E21B
主分类号
E21B29/00
代理机构
代理人
主权项
地址
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