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发明名称
Joint rotatif étanche à la pression régnant dans des puits de pétrole ou autres
摘要
申请公布号
FR1225688(A)
申请公布日期
1960.07.04
申请号
FR19590783482
申请日期
1959.01.07
申请人
HYDRIL COMPANY
发明人
分类号
E21B33/08;F16L27/08
主分类号
E21B33/08
代理机构
代理人
主权项
地址
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