Ключевые слова: alternate, background, backup, battery, business, center, control, current, dangerous, data, diesel, duty, electric, electrical, electricity, emergency, energy, engine, engineering, equipment, external, factory, filter, fuel, generation, generator, heavy, high, industrial, industry, interior, machine, machinery, mechanical, motor, oil, plant, power, radiator, room, standby, steel, supply, system, technical, technology, turbine, unit, voltage,