Ключевые слова: aqueduct, clear, cold, conduit, connection, construction, dirty, duct, engineering, equipment, faucet, flow, gas, grunge, hose, industrial, industry, iron, leak, leaks, line, main, metal, oil, old, pipe, pipeline, piping, plant, power, refreshment, repair, rust, rusty, spring, stain, steel, supply, system, tap, tube, tubing, valve, valves, water, wheel,