Ключевые слова: 3d, background, bolt, chemical, color, colorful, conduit, connection, construction, control, element, engineering, equipment, factory, faucet, fuel, gas, gasoline, green, icon, illustration, industrial, industry, isolated, metal, natural, object, oil, orange, petroleum, pipe, pipeline, piping, plumbing, power, pressure, pump, render, rendering, sign, steel, symbol, system, tap, technology, tube, valve, water, yellow,