塑化
上游
煤輕油
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中游
二氯乙烷(EDC)
#<StockCompany::ActiveRecord_Associations_CollectionProxy:0x000075a306380468>
下游
低密度聚乙烯(LDPE)
#<StockCompany::ActiveRecord_Associations_CollectionProxy:0x000075a306543e80>
己內醯胺(CPL)
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