Ключевые слова: abstract, background, barb, barbed, barbwire, barrier, black, blue, border, boundary, cage, chain, construction, crime, danger, design, enclosure, fence, forbidden, freedom, grid, guard, illustration, industrial, industry, iron, isolated, jail, link, mesh, metal, metallic, military, net, old, pattern, prison, protection, safety, seamless, security, shape, sharp, sky, steel, texture, wall, war, white, wire,