Ключевые слова: access, accessibility, airport, automatic, barrier, boundary, business, check, china, city, control, door, editorial, enter, entrance, entry, equipment, exit, gate, gateway, hall, interior, machine, metro, modern, open, pass, passage, passenger, public, rail, railway, row, security, service, sign, speed, station, subway, system, technology, ticket, train, transit, transport, transportation, travel, turnstile, underground, urban,