Retro-reflecting materials for traffic safety; photometric minimum requirements for nighttime markings, for delineators and for road markings for road traffic
German title
Retroreflektierende Materialien zur Verkehrssicherung - Lichttechnische Mindestanforderungen an Nachtkennzeichen für Leitpfosten und an Fahrbahnmarkierungen im Straßenverkehr
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