Ключевые слова: air, apparatus, ballast, complex, conduit, control, drain, engine, engineering, equipment, factory, faucet, flow, fuel, fuel pump, gas, gasoline, handhold, handle, hydrant, industrial, industry, iron, machine, machinery, metal, military, oil, oil industry, old, outlet, panel, pipe, pipeline, power, pressure, red, rotation, steel, stopcock, switch, tap, technology, tool, turn, two, valve, water pump, wheel, white,