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发明名称
BOHRROHRVERBINDUNGSSTUCK
摘要
申请公布号
AT334850(B)
申请公布日期
1977.02.10
申请号
AT19740003734
申请日期
1974.05.06
申请人
THE RUCKER COMPANY
发明人
分类号
E21B17/046;E21B33/038;(IPC1-7):E21B17/02
主分类号
E21B17/046
代理机构
代理人
主权项
地址
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