Ключевые слова: air, background, barometer, boiler, closeup, concept, control, device, dial, display, energy, engineering, equipment, factory, fuel, gage, gas, gauge, hydraulic, indicator, industrial, instrument, liquid, machine, macro, manometer, measurement, mechanical, metal, meter, needle, object, oil, part, pipe, pipeline, power, precision, pressure, pump, scale, steel, technical, technology, thermometer, tool, valve, water, white, work,