Ключевые слова: air, air pollution, be careful, cummins, cylinder, dangerous, diesel, dust, electric, electrical, electricity, engine, engineer, engineering, factory, filter, fuel, gasoline, generator, hazardous, heavy duty, hot, industrial, industry, line, mechanical, mechanics, metal, mw, operator, piping, piston, plant, power, production, spare, valve, vibration, warning, watt, wire,