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发明名称
摘要
申请公布号
DE9204503(U1)
申请公布日期
1993.08.05
申请号
DE19920004503U
申请日期
1992.04.02
申请人
DELMAG MASCHINENFABRIK REINHOLD DORNFELD GMBH & CO, 73730 ESSLINGEN, DE
发明人
分类号
E21B3/035;E21B17/07;F16D3/02;F16D3/62;F16L55/02
主分类号
E21B3/035
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代理人
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