Ключевые слова: abstract, backdrop, backgrounds, blue, built structure, business, chemical, colors, construction industry, curve, design, development, engineer, engineering, environment, equipment, factory, fossil fuel, fuel and power generation, gasoline, illustration, indoors, industrial, industry, machine valve, machinery, material, metal, multi colored, natural gas, nature, occupation, oil, oil industry, petrochemical plant, pipe, pipeline, pipes, pollution, refinery, science, shape, shiny, steel, technology, tube, working, yellow,