Ключевые слова: barb, barbed, barbwire, barrier, base, border, cell, cellular, closed, communication, construction, defend, defense, detail, door, entry, equipment, fence, forbidden, frame, framework, grid, guard, iron, lattice, line, mesh, metal, mobile, obstacle, pattern, private, protection, red, restricted, safety, secure, security, sharp, station, steel, structure, telecom, telecommunication, tower, transmitter, wall, wire,