Ключевые слова: abstract, aeration, aged, backdrop, background, close, close up, closeup, concept, design, detail, dirty, geometric, grate, gray, grey, grid, grill, industrial, iron, lines, material, metal, metal frame, metallic, old, panel, pattern, safety, shabby, shape, silver, square, steel, structure, surface, texture, textured, up, ventilation, ventilation system, worn,