Ключевые слова: accessibility, arrive, asia, barricade, barrier, boundary, business, card, check, china, chip, contemporary, control, corridor, counter, departure, display, empty, entrance, entry, fare, fee, fence, floor, forbidden, gate, hall, hongkong, machine, metro, modern, monorail, nobody, pay, platform, punch, railway, scan, scanning, security, station, subway, technology, ticket, token, train, transport, transportation, turnstile, underground,