Ключевые слова: background, blue, car, clockwork, cog, cogs, cogwheel, cogwheels, concept, connection, construction, cooperation, dependence, dependency, energy, engine, engineering, equipment, gear, gears, industrial, industry, interconnect, interconnecting, interconnection, iron, machine, machinery, macro, mechanical, mechanism, metal, motion, movement, part, power, progress, rapport, relation, rotation, rotational, sign, steel, symbol, teamwork, technology, transmission, wheel, work,