Ключевые слова: bill, boiler, business, circuit, counter, current, economy, efficiency, electric, electric heater, electrical, electrician, electricity, electricity meter, energy, energy meter, energy saving, energy supply, environment, equipment, gas, gas meter, general services, green, heater, home, hour, house, industrial, industry, instrument, kilowatt, measure, meter, natural, natural gas, nature, power, power line, save, supply, technology, utilities, utilities company, utility, volt, voltage, watt, winter,