Ключевые слова: abstract, alloy, arena, backdrop, background, barb, barrier, black, building, court, decorative, enclosure, exterior, grate, graticule, green, grid, heavy, horizontal, industrial, industry, iron, line, link, loudspeaker, mesh, metal, metallic, metallic mesh, net, old, pattern, pitch, pitted, plaque, rectangle, red, repetition, safety, shape, speaker, stadium, steel, strength, support, texture, up, white, wire, wired,