Ключевые слова: abstract, black, bolt, bolts, close, closeup, component, construction, design, engineering, equipment, fastener, fasteners, indoor, industrial, industry, iron, many, metal, metallic, nail, nails, new, nobody, nut, nuts, objects, parts, pattern, repair, screw, screws, shiny, silver, steel, supplies, threaded, threads, tool, white, work,