Ключевые слова: abstract, background, barricade, barrier, black, blurred, border, cage, chain, chained, chainlink, close, color, design, enclose, fence, green, grid, guard, industrial, iron, jail, link, mesh, metal, metallic, nature, net, outdoor, pattern, prevention, private, property, protection, safety, security, separate, shape, steel, summer, sun, symmetry, technology, texture, textured, tree, wire, wired,