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Facet browsing: Date Issued

Current Search ((ALL：聚四氟乙烯))
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2001 2 2000 1 1998 4
1997 2 1996 1 1995 2
1994 3 1993 3 1992 3
1991 6 1990 2 1989 4
1988 1 1987 2 1986 4
1985 1 1984 5 1983 4
1982 10 1981 4