Ключевые слова: agricultural, agriculture, automatic, automatic belt, chain gear, chain tensioning, closeup, cog, cogwheel, combine, combine harvester, concept, conceptual, dirty, drive, engineering, equipment, fragment, gear, grease, grease chain, grunge, harvester, heavy, idea, indoor, industrial, industry, machine, machinery, mechanics, mechanism, metal, metallic, objects, old, part, rust, rusty, steel, still, technical, tensioning, wheels, working,