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a residue of crude oil refining processes. The product remaining after the lighter fractions - gasoline, kerosene, lubricating oils, wax, and distillate fuels - have been extracted from the crude; residual fuel oil.
schweres Heizöl . EKI terminibaas Esterm. Eesti Keele Instituut, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//esterm/schweres%20Heiz%C3%B6l/1/deu (20.06.2026)