Ключевые слова: abstract, architecture, background, blue, building, business, city, construction, corporate, design, down, exit, exterior, factory, floor, high, house, industrial, industry, inside, iron, ladder, metal, modern, nobody, office, outdoor, outside, railing, safety, sky, stair, staircase, stairs, stairway, steel, step, steps, storage, structure, tank, technology, tower, up, urban, wall, window,