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发明名称
APPAREIL DESTINE A ETRE MONTE SUR UN DERRICK POUR INTRODUIRE OU RETIRER LES SECTIONS DE TIGE D'UNE OU PLUSIEURS GRILLES DE SUPPORT
摘要
申请公布号
FR2291343(A1)
申请公布日期
1976.06.11
申请号
FR19750034757
申请日期
1975.11.14
申请人
LAMB INDUSTRIES INC
发明人
分类号
E21B19/14;(IPC1-7):E21B19/14
主分类号
E21B19/14
代理机构
代理人
主权项
地址
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