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Filters ((Source Publication:石油化工) AND (Document Type:期刊论文) AND (Community:非现建制))
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1995 2 1994 1 1993 3
1992 3 1990 1 1988 3
1986 1 1983 2 1982 2
1981 7 1980 2 1979 2
1977 1 1976 4 1975 2
1974 3