Ключевые слова: abstract, army, background, barb, barbed, barrier, black, border, boundary, construction, danger, design, deterrent, distressed, farm, forbidden, forces, gate, graphic, guard, industry, isolated, metal, military, old, pattern, post, prevent, prison, private, rust, rusted, rusty, safety, secure, security, sharp, silhouette, spike, spiral, steel, sting, texture, torture, trespass, wall, war, warning, wire,