Ключевые слова: abstract, antique, background, chain, circle, close, closeup, cog, cogs, cogwheel, detail, dirty, dusty, engine, engineering, factory, function, functional, gear, gearing, gears, grunge, history, industrial, industry, innovation, iron, machine, machinery, macro, mechanic, mechanical, mechanism, metal, metallic, motion, old, part, precision, production, retro, rust, rusted, rusty, shallow focus, steel, system, systematic, technical, technology, transmission, vintage, wheel, wheels,