Case C-772/19: Judgment of the Court (Ninth Chamber) of 25 February 2021 (request for a preliminary ruling from the Verwaltungsgerichtshof — Austria) — Bartosch Airport Supply Services GmbH v Zollamt Wien (Reference for a preliminary ruling — Common Customs Tariff — Combined Nomenclature — Tariff classification — Tariff heading 8701 and Tariff heading 8705 — Interpretation — Aircraft tractor)