Ключевые слова: 3d, art, background, black, bolt, conduit, connection, construction, control, cut, element, engineering, equipment, factory, faucet, fuel, gas, gasoline, icon, illustration, industrial, industry, isolated, long, metal, object, oil, origami, paper, paperart, papercut, pipe, pipeline, piping, plumbing, power, pressure, pump, shadow, sign, steel, symbol, system, tap, technology, tube, valve, volumetric, water,