Ключевые слова: abstract, army, arrest, background, barb, barbed, barbwire, barrier, bars, black, border, boundary, danger, design, deterrent, farm, fence, forces, gate, graphic, guard, illustration, iron, isolated, isolation, jail, keep, line, metal, old, pattern, post, prevent, prison, protection, rust, secure, security, sharp, silhouette, spike, steel, sting, torture, trespass, up, war, white, wire,