Ключевые слова: abstract, architecture, background, big, building, chemical, circular, construction, container, curve, design, detail, energy, environment, exterior, factory, fuel, gas, gasoline, handrail, industrial, industry, iron, ladder, manufacturing, metal, oil, outdoors, petroleum, plant, refinery, reserve, safety, sky, spiral, stair, staircase, stairs, stairway, steel, step, storage, structure, tank, up, way, white, yard,