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发明名称
PUNTA DA TRIVELLAZIONE A CONI ROTANTI CON SFASAMENTO POSITIVO E NEGATIVO E CONFIGURAZIONE A FUNZIONAMENTO REGOLARE.
摘要
申请公布号
IT1284340(B1)
申请公布日期
1998.05.18
申请号
IT1996TO00042
申请日期
1996.01.25
申请人
BAKER HUGHES INCORPORATED
发明人
ISBELL MATTHEW RAY;PESSIER RUDOLF C.O.
分类号
E21B10/08;E21B17/10
主分类号
E21B10/08
代理机构
代理人
主权项
地址
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