Judgment of the Court (Sixth Chamber) of 6 July 2000 in Case C-11/99 (reference for a preliminary ruling from the Arbeitsgericht Siegen): Margrit Dietrich v Westdeutscher Rundfunk (Directive 90/270/EEC on the minimum safety and health requirements for work with display screen equipment — Scope — Meaning of display screen equipment for the purposes of Article 2 — Meaning of "drivers' cabs or control cabs for vehicles or machinery" for the purposes of Article 1)