Ключевые слова: abutments, assembly, beams, black white, bolt, bolts, bridge, cap nut, concrete, crossing, durable, fastened, galvanized, gate, girders, hardware, industrial, industry, infrastructure, machined steel, manufacture, nut, planks, rails, road, rugged, screw, shadows, span, steel, steel construction, still, still life, strong, structure, threaded, threaded rod, tight, tough, welded, woodland,