Ключевые слова: accuracy, action, background, bicycle, bike, black, chain, circle, concept, connect, connection, design, drive, efficiency, energy, engine, equipment, gear, gearing, gearwheel, illustration, industry, invention, iron, isolated, machine, mechanism, metal, metallic, motion, objects, part, pinion, power, progress, shape, silver, steel, strength, success, teamwork, technology, threedimensional, unity, wheel, white, work,