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经营范围
发明名称
Centralizer
摘要
申请公布号
GB2316422(A)
申请公布日期
1998.02.25
申请号
GB19960017789
申请日期
1996.08.24
申请人
* WEATHERFORD/LAMB INC
发明人
BERND * REINHOLDT;JORG * LORENZ;ARNOLD * STOKKA
分类号
E21B17/10;(IPC1-7):E21B17/10
主分类号
E21B17/10
代理机构
代理人
主权项
地址
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