Ключевые слова: 3d, art, background, barrel, broken, building, business, cistern, color, colorful, contour, design, drain, energy, factory, fix, flat, fuel, gas, gasoline, gradient, icon, illustration, industrial, industry, isolated, isometric, leak, line, linear, lineart, oil, outline, petrol, petroleum, pipe, pipeline, plumbing, pollution, power, pump, railway, repair, sewer, supply, symbol, tank, tube, water,