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发明名称
Couronne rotative de forage
摘要
申请公布号
CH415508(A)
申请公布日期
1966.06.30
申请号
CH19640006501
申请日期
1964.05.19
申请人
SOCIETE NATIONALE DES PETROLES D'AQUITAINE
发明人
GSTALDER,SERGE;RAYNAL,JEAN
分类号
E21B10/46;E21B10/60;E21B10/61;(IPC1-7):E21B9/36
主分类号
E21B10/46
代理机构
代理人
主权项
地址
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