Ключевые слова: building, center, city, concept, corona, coronavirus, distance, distancing, electric, elevator, entrance, escalator, escalators, floor, indoor, interior, lift, light, mall, metal, metallic, metro, modern, move, new, nobody, pandemic, perspective, platform, public, safety, shopping, side, social, stair, staircase, stairs, stairway, station, steel, subway, technology, transport, transportation, travel, underground, up, urban, virus, way,