Ключевые слова: aged, background, black, bolt, brown, chemical, conduit, connection, construction, dirty, energy, engineering, equipment, facility, factory, faucet, flow, fuel, gas, industrial, industry, iron, isolated, line, metal, metallic, oil, old, pipe, pipeline, piping, plant, plumbing, power, pressure, pump, rust, rusty, screw, steel, supply, system, tap, technology, tube, tubing, valve, water, weathered, white,