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Terms for subject Ecology containing 共 聚 | all forms | in specified order only
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尿素-三聚氰胺-甲醛共聚树脂urea-melamine-formaldehyde co-condensed resin
线性低密度聚乙烯/聚苯乙烯共混linear low density polyethylene LLDPE/polystyrene PS blend
苯乙烯共聚styrofoam copolymer