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värvusetu põlev gaas, küllastumatu süsivesinik
этен . Koolisõnastikud 2005–2010. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//kool_KV/%D1%8D%D1%82%D0%B5%D0%BD/1/rus (28.07.2026)