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发明名称
Anordning for beskyttelse av boringen i et br°nnhode
摘要
申请公布号
NO305768(B1)
申请公布日期
1999.07.19
申请号
NO19920001398
申请日期
1992.04.09
申请人
FMC CORP
发明人
KOLEILAT, BASHIR M.
分类号
E21B17/10;E21B33/04;(IPC1-7):E21B33/04;E21B17/12
主分类号
E21B17/10
代理机构
代理人
主权项
地址
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