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发明名称
Accouplement de tubes de forage, réversible et séparable par un couple exercé sur cet accouplement
摘要
申请公布号
FR1428807(A)
申请公布日期
1966.02.18
申请号
FR19650009973
申请日期
1965.03.19
申请人
发明人
DAVIS CHARLES JORDAN
分类号
E21B17/046
主分类号
E21B17/046
代理机构
代理人
主权项
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