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发明名称
Boreror-beskytteranordning
摘要
申请公布号
NO323756(B1)
申请公布日期
2007.07.02
申请号
NO19980001654
申请日期
1998.04.08
申请人
WESTERN WELL TOOL INC
发明人
MOORE BRUCE N;KRUEGER R ERNST
分类号
E21B17/10
主分类号
E21B17/10
代理机构
代理人
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