Ключевые слова: art, background, blue, bolt, bright, color, colorful, construction, contour, control, engineering, equipment, factory, faucet, fuel, gas, gasoline, glowing, gradient, icon, illustration, industrial, industry, isolated, light, line, linear, lineart, metal, neon, object, oil, outline, pipe, pipeline, piping, plumbing, power, pressure, pump, sign, steel, symbol, system, tap, technology, tube, valve, water,