Ключевые слова: airport, architecture, background, building, business, center, city, contemporary, convention, design, down, elevator, escalator, floor, indoor, inside, interior, lift, mall, metal, metro, modern, motion, move, movement, moving, public, seminar, stair, staircase, stairway, station, steel, step, technology, terminal, transport, transportation, travel, up, urban, walkway, way,