Ключевые слова: abstract, backdrop, background, barbed, barrier, black, border, cage, chrome, construction, danger, design, element, enclose, fence, frame, freedom, grate, grid, hole, industrial, industry, iron, material, mesh, metal, metallic, netting, pattern, plate, protection, repeat, repetition, safety, security, shape, stainless, steel, technology, texture, textured, wall, wallpaper, white, wire,