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经营范围
发明名称
Refining of lubricating oils
摘要
申请公布号
US2711990(A)
申请公布日期
1955.06.28
申请号
US19510213752
申请日期
1951.03.03
申请人
CAMPBELL SUMNER E
发明人
CAMPBELL SUMNER E.
分类号
C10G21/06
主分类号
C10G21/06
代理机构
代理人
主权项
地址
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