Ключевые слова: aged, connect, connection, connector, construction, corroded, device, direction, dirty, distribution, energy, engineering, equipment, flange, flow, fuel, gas, gate, grunge, inner, joint, line, metal, old, open, outer, pipe, pipeline, piping, pressure, red, rough, rust, rusted, rusty, spray, steel, supply, system, technical, technique, transit, tube, tubing, urban, valve, view, wall, yellow,