Ключевые слова: abstract, arc, arch, architectural, architecture, background, beam, blue, bolt, bridge, building, business, city, construction, curve, design, detail, engineering, frame, girder, highway, horizontal, industrial, industry, iron, metal, modern, no people, outdoor, pattern, perspective, river, rivet, road, shape, silhouette, sky, steel, strength, strong, structure, support, tall, technology, transport, transportation, travel, urban,