Ключевые слова: abstract, architecture, background, bar, barrier, bars, black, building, cage, closeup, construction, dark, decoration, defense, design, fence, freedom, grate, grid, illustration, industrial, iron, iron bars, jail, lines, mesh, metal, outdoor, pattern, prison, protect, protection, railing, rails, row, safety, security, steel, strong, structure, technology, texture, urban, wall, wire, wrought,