Ключевые слова: abstract, background, barrier, border, building, cage, chain, city, close, construction, decorative, design, drawing, element, fence, grid, guard, industrial, industry, iron, jail, link, mesh, metal, pattern, pole, prison, protection, row, safety, security, selective focus, shallow depth of field, shape, spike, square, steel, strong, system, texture, toned, wall, wallpaper, wave, web, wire,