Ключевые слова: activate, alarm, alert, assistance, backdrop, background, barrier, box, burn, cage, call, chain, construction, danger, emergency, enclose, fence, fire, flame, grid, handle, help, industrial, industry, iron, isolated, key, mesh, metal, net, panel, panic, prevent, prison, protection, pull, red, rescue, safety, school, security, sign, steel, system, texture, urgency, wall, warning, white, wire,