Ключевые слова: access, accessibility, airport, automatic, barrier, boundary, building, business, card, check, checkpoint, city, closed, control, design, door, doorway, electronic, enter, entrance, entry, equipment, exit, gate, gateway, indoor, interior, machine, metal, metallic, metro, modern, nobody, office, open, pass, public, reader, security, station, steel, subway, system, technology, ticket, tourniquet, transportation, turnstile, underground, urban,