Ключевые слова: 3d, abstract, background, barrel, biotechnology, business, chemical, composition, connection, connector, construction, engineering, equipment, factory, fuel, gas, heating, icon, illustration, industrial, industry, infographic, iron, isolated, metal, oil, petroleum, pipe, pipeline, pipes, piping, plant, plastic, plumbing, pollution, pressure, production, pump, refinery, season, sewer, sewerage, steel, symbol, system, technology, tube, wastewater, water,