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发明名称
VORRICHTUNG UND VERFAHREN ZUR VERBESSERTEN GREIFSICHERHEIT BEIM GREIFEN VON ROHREN
摘要
申请公布号
DE69706196(D1)
申请公布日期
2001.09.20
申请号
DE19976006196
申请日期
1997.04.21
申请人
CASTILLE, DALE J.;WEBRE, MIKE;MOSING, DONALD E.
发明人
CASTILLE, DALE J.;WEBRE, MIKE;MOSING, DONALD E.
分类号
E21B19/07;E21B19/10;(IPC1-7):E21B7/00
主分类号
E21B19/07
代理机构
代理人
主权项
地址
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