Ключевые слова: auto, automotive, belt, belt drive, chain, closeup, cog, cogwheel, detail, dirty, engine, engineering, equipment, factory, gear, gear assembly, grunge, hardware, industrial, industry, iron, machine, machinery, manufacturing, mechanic, mechanical, mechanism, mechanization, metal, modernization, motor, obsolete, old, part, parts, power, pulley, retro, rollers, rust, rusty, steel, technology, tool, transmission, vintage, wheel, wooden, work, workshop,