Ключевые слова: background, binding, business, car, cog, cogs, cogwheel, concept, connect, connection, design, engine, engineering, gear, gearbox, gears, grease, industrial, industry, inside, interlock, lubricants, machine, machinery, macro, mechanical, mechanics, mechanism, metal, metallic, motion, part, parts, power, precision, set, steel, teamwork, technology, teeth, transmission, wheel, wheels, work,