Ключевые слова: area, background, barb, barbed, barbwire, barrier, blue, border, boundary, chain, closed, closeup, control, danger, day, defense, fence, field, forbidden, freedom, guard, human, industrial, industry, iron, isolated, limit, los, metal, military, outdoor, politics, prison, private, prohibited, protection, razor, restricted, round, safety, security, sharp, sky, steel, system, wall, war, wire, yard, zone,