Ключевые слова: apparatus, arrangement, bicycle, blue tone, chain, circle, closeup, cogwheel, concept, cycle, design, development, energy, engineering, equipment, force, gear, gearwheels, grease, idea, industrial, industry, iron, machine, machinery, macro, mechanicalparts, mechanics, mechanism, metal, metallic, nobody, object, oil, part, pinion, power, precision, shiny, speed, sport, sprocket, steel, stilllife, strength, teamwork, technology, tools, transmission, vehicle, wheel,