Ключевые слова: and, black, carving, circle, claw, close, cog, cogwheel, connection, electric motor, engine, engineering, equipment, factory, gear, gearing, gray, industrial, industrial equipment, industry, innovation, interlocked, iron, large, machine, machine teeth, machinery, manufacturing, mechanical, mechanism, metal, metallic, old, pinion, power, precision, rusty, screw, shiny, steel, surface, symbol, teamwork, technology, tool, transmission, turning, unity, up, wheel,