Ключевые слова: accident, alarm, alert, alertness, background, bell, box, break, building, business, button, call, center, control, danger, emergency, equipment, factory, fire, flame, glass, hand, help, home, hospital, industrial, industry, isolated, light, office, panel, protect, protection, pull, push, red, rescue, room, safe, safety, security, service, sign, single, switch, symbol, system, wall, warn, white,