Ключевые слова: agricultural, agriculture, background, chain, circle, closeup, cog, cogwheel, construction, detail, dirty, drive, engine, engineering, equipment, excavator, farm, farming, gear, gearing, grunge, industrial, industry, iron, machine, machinery, mechanic, mechanical, mechanism, metal, old, part, power, production, rust, rusted, rusty, sprocket, steel, technology, tractor, transmission, used, vehicle, vintage, wheel, work,