Ключевые слова: 3d, bolt, brown, circle, cog, cogs, cogwheel, collection, cut out, design, engine, engineering, equipment, factory, frame, gear, gray, group, grunge, hardware store, icon, illustration, industry, iron, isolated, large group, machine, machine part, material, mechanic, mechanism, metal, metallic, objects, plain background, rusty, shape, silver, stainless steel, steel, symbol, teamwork, technology, teeth, template, turning, variation, wheel, white background, working,