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经营范围
发明名称
REDUNDANTES BOHRHEBEWERK
摘要
申请公布号
DE69725865(T2)
申请公布日期
2004.11.04
申请号
DE19976025865T
申请日期
1997.08.18
申请人
NATIONAL-OILWELL, L.P.
发明人
DYER, D.;KONDO, S.
分类号
B66D1/54;E21B19/00;(IPC1-7):B66D1/54;E21B19/08
主分类号
B66D1/54
代理机构
代理人
主权项
地址
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