Ключевые слова: accuracy, antique, close up, damaged, dark, dirty, equipment, factory, gauge, historical, indication, indoor, industrial, industry, instrument of measurement, instrumentation, machine, manometer, measuring, metal, meter, number, object, obsolete, old, old fashioned, part of, physical pressure, pipe, plant, pneumatic, precision, round, rust, rusty, sign, steel, technical, technology, valve, weathered,