Ключевые слова: abstract, access, accessibility, background, barb, barbed, barbwire, barrier, black, border, boundary, cage, chain, closed, construction, crime, danger, dividing, enclosed, enclosure, fence, forbidden, frame, freedom, grate, guard, iron, isolated, isolation, jail, mesh, military, nobody, pattern, prison, private, protection, protective, safety, seamless, security, shape, sharp, steel, stockade, system, warning, white, wire, wired,