Ключевые слова: arrangement, circle, classic, close up, cogwheel, connection, energy, engine, engineering, equipment, factory, gear, group of objects, image, industrial, industry, interlocked, iron, large, machine, machine part, machine teeth, machinery, manufacturing, mechanism, metal, motion, object, part, part of, power, precision, quality, reliability, retro revival, selective focus, shape, steel, strength, surface, teamwork, technology, teeth, togetherness, transmission, turning, vehicle, wheel, work,