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发明名称
Joint à lubrifianl, notamment pour trépans pour le forage du sol
摘要
申请公布号
FR1208242(A)
申请公布日期
1960.02.22
申请号
FRD1208242
申请日期
1958.05.30
申请人
HUGHES TOOL COMPANY
发明人
分类号
E21B10/22;E21B10/25
主分类号
E21B10/22
代理机构
代理人
主权项
地址
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