Ключевые слова: accuracy, backgrounds, belt, bonding, business finance and industry, chain, closeup, communication, complexity, connection, connection block, conveyor belt, dirty, dumbbell, electric motor, endurance, engine, engineering, equipment, extreme closeup, factory, gear, gearshift, group of objects, heavy, industry, interlocked, iron metal, link, lubrication, machine part, manufacturing equipment, mechanic, metal, metallic, mode of transport, motion, motor oil, no people, part of, serrated, steel, strength, teamwork, technology, turning, unity, wheel, working,