Ключевые слова: abstract, background, bolt, brass, carpentry, circle, closeup, construction, cross, detail, fastening, focus, gray, hardware, head, icon, image, industry, instrument, iron, isolated, large, macro, mechanic, metal, minus, nobody, nuts, object, old, part, plus, reflection, screw, selftapping, shape, sign, silver, star, steel, symbol, tool, white, work, zinc,