Ключевые слова: circle, clock, clockwork, close, closeup, cog, cogs, cogwheel, collaboration, connect, connection, creation, detail, development, differential, engine, engineering, factory, gear, gear arrangement, industrial, industry, iron, machine, machinery, macro, mechanics, metal, metallic, mill, motion, movement, power, rotation, rotational speed, round, solve, steel, teamwork, technology, together, tower, transmission, turning, up, vintage, wheel, work,