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发明名称
BOHRGESTÄNGEVERBINDER
摘要
申请公布号
DE59913178(D1)
申请公布日期
2006.04.27
申请号
DE19995013178
申请日期
1999.05.21
申请人
VALLOUREC MANNESMANN OIL & GAS GERMANY GMBH
发明人
KRUG, GERHARD;QUADFLIEG, ERICH
分类号
E21B17/042;F16L15/00;F16L15/04
主分类号
E21B17/042
代理机构
代理人
主权项
地址
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