Ключевые слова: black and white, conduit, container, crude oil, cylinder, deliver, delivery, diminishing perspective, duct, economic, energy, environment, factory, flammable, fuel, gas, gasoline, industrial, industry, line, manufacture, manufacturing, metal, monochrome, oil, oil tank, petrol, petroleum, pipe, pipe line, pipeline, piping, plant, power, production, resource, steel, storage, structure, supply, system, transmission, tube, valve, vanishing point, warehouse,