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antiknock substances - substances added to petrol to lessen its tendency to detonate or 'knock' in an engine, eg lead (IV) ethyl
additif antidétonant . EKI terminibaas Esterm. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//esterm/additif%20antid%C3%A9tonant/1/fra (02.08.2026)
