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发明名称
Lubricating system
摘要
申请公布号
US3007750(A)
申请公布日期
1961.11.07
申请号
US19580742277
申请日期
1958.06.16
申请人
HUGHES TOOL COMPANY
发明人
CUNNINGHAM ROBERT A.
分类号
E21B10/24;F16C33/66
主分类号
E21B10/24
代理机构
代理人
主权项
地址
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