Ключевые слова: boiler, control, device, dial, empty, energy, equipment, fuel, gage, gas, gasoline, gauge, heat, hydraulic, indicator, industrial, industry, instrument, level, machine, manometer, measure, measurement, metal, meter, needle, oil, petrol, pipes, power, precision, pressure, pump, station, steam, steel, storage, system, tank, technology, test, tool, valve, water, zero,