Ключевые слова: abstract, ancient, artistic, background, barrier, black, circle, circles, circular, cover, design, detail, drain, drainage, element, gaps, grate, grill, holes, industrial, iron, lines, mesh, metal, metallic, object, old, paint, painted, pattern, perforated, sanitation, shadow, shaped, shapes, silver, steel, surface, texture, textures, vertical, wallpaper,