Ключевые слова: abstract, angle, arch, architecture, beam, bolt, bridge, building, closeup, construction, contemporary, cross, design, detail, engineering, exterior, filtered, frame, geometric, girder, heavy, industrial, industry, infrastructure, iron, lattice, link, metal, modern, nobody, outdoors, part, pattern, rivet, shape, steel, strength, strong, structure, support, supporting, toned, transportation, truss, urban, vintage,