Ключевые слова: abstract, architecture, backdrop, background, barrier, black, blank, business, color, concrete, construction, corrugated, danger, desktop, detail, exterior, fence, gray, grunge, grungy, hazard, industrial, industry, iron, line, marked, material, metal, metallic, modern, pattern, plate, problem, roof, scene, sheet, sign, silver, steel, stripes, structure, surface, texture, wall, wallpaper, weathered, worn, yellow, zinc,