Ключевые слова: aged, air, background, bar, barometer, broken, building, connection, construction, curve, dirty, drain, energy, engineering, equipment, factory, faucet, flow, fuel, gas, heat, industrial, industry, iron, machine, metal, old, pipe, pipeline, power, pressure, pump, red, stainless, steel, system, tap, technology, tube, vacuum, valve, vintage, wall, water, wheel,