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发明名称
Extraction process
摘要
申请公布号
US2139392(A)
申请公布日期
1938.12.06
申请号
US19350023552
申请日期
1935.05.27
申请人
SHELL DEVELOPMENT COMPANY
发明人
TIJMSTRA SIJBREN
分类号
C10G21/02
主分类号
C10G21/02
代理机构
代理人
主权项
地址
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