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摘要
申请公布号
DE19955377(C2)
申请公布日期
2002.05.02
申请号
DE19991055377
申请日期
1999.11.10
申请人
MANNESMANN AG
发明人
KRUG, GERHARD;LENZE, FRIEDRICH;QUADFLIEG, ERICH
分类号
E21B17/042;F16L15/04;F16L15/06;(IPC1-7):F16L15/00
主分类号
E21B17/042
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代理人
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