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发明名称
Core oil
摘要
申请公布号
US1970916(A)
申请公布日期
1934.08.21
申请号
US19300451856
申请日期
1930.05.12
申请人
STANDARD OIL COMPANY
发明人
PAYNE ELMER H.
分类号
B22C1/24
主分类号
B22C1/24
代理机构
代理人
主权项
地址
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