Ключевые слова: 20s, adult, air, auto, automobile, automotive, bearing, brake, car, concentration, construct, cylinder, detail, disc, element, engine, equipment, filter, gear, industry, isolated, machine, machinery, mechanic, mechanical, mechanism, metal, motor, new, object, oil, part, person, piston, plug, power, repair, service, set, spare, spare part, spare parts, steel, technology, threedimensional, tool, transmission, transportation, vehicle, wheel, white, workshop,