http://general-terms.thesaurus.ekt.gr/vocabhttp://general-terms.thesaurus.ekt.gr/vocab?tema=11979synthetic organic polymers http://general-terms.thesaurus.ekt.gr/vocab?tema=11979 synthetic polymers BT http://general-terms.thesaurus.ekt.gr/vocab?tema=11979 polyhydrocarbons NT http://general-terms.thesaurus.ekt.gr/vocab?tema=11979 acrylic polymers NT http://general-terms.thesaurus.ekt.gr/vocab?tema=11979 polyethers NT http://general-terms.thesaurus.ekt.gr/vocab?tema=11979 polyamids NT http://general-terms.thesaurus.ekt.gr/vocab?tema=11979 vinylic polymers NT http://general-terms.thesaurus.ekt.gr/vocab?tema=11979 polyacetales NT http://general-terms.thesaurus.ekt.gr/vocab?tema=11979 polyesters NT http://general-terms.thesaurus.ekt.gr/vocab?tema=11979 polyurethanes NT