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发明名称
METHOD OF PRELIMINARY PURIFYING CRUDE COAL TARS
摘要
申请公布号
PL140202(B1)
申请公布日期
1987.04.30
申请号
PL19840249095
申请日期
1984.08.07
申请人
发明人
分类号
C10C;C10C1/06;(IPC1-7):C10C1/06
主分类号
C10C
代理机构
代理人
主权项
地址
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