dyed freshwater cultured pearl 染色淡水养殖黑珍珠
chinese freshwater cultured pearl 中国淡水养珠
irradiated freshwater cultured pearl 辐照淡水养殖珍珠
·2,447,543篇论文数据，部分数据来源于NoteExpress
Pearl categories: natural pearls, cultured pearls, natural sea beads, sea pearls, freshwater pearls, South Sea pearls, black pearls;
珍珠类：天然珍珠、养殖珍珠、天然海珠、海水珍珠、淡水珍珠、南洋珍珠、黑珍珠；
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