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polümeer, mida kasutatakse villataoliste kiudude, kilede, lakkide, liimide vms valmistamiseks, sellest saadud sünteeskiud
a polymer in which the repeated structural unit in the chain is of the ester type, kahealuseliste orgaaniliste hapete ja mitmealuseliste alkoholide polükondensatsiooni saadus