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发明名称
Fremgangsmåte og anordning i forbindelse med stigerör
摘要
申请公布号
NO20012573(A)
申请公布日期
2001.11.27
申请号
NO20010002573
申请日期
2001.05.25
申请人
COOPER CAMERON CORP
发明人
THEISS, DAVID HAROLD
分类号
E21B17/01;E21B33/038;E21B33/076;E21B43/01;(IPC1-7):E21B17/01
主分类号
E21B17/01
代理机构
代理人
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