Case C-499/20: Judgment of the Court (Ninth Chamber) of 10 February 2022 (request for a preliminary ruling from the Symvoulio tis Epikrateias — Greece) — DIMCO Dimovasili M.I.K.E. v Ypourgos Perivallontos kai Energeias (Reference for a preliminary ruling — Approximation of laws — Directive 97/23/EC — Pressure equipment — CE marking — Placing on the market and putting into service — Restrictions aimed at ensuring the protection of persons — Articles 34 and 36 TFEU — National legislation imposing restrictions on the method of installation of gas pipes)