Ключевые слова: alarm, alert, background, building, bus, business, ceiling, construction, control, crime, danger, detector, digital, electric, electronic, emergency, equipment, fire, guard, industry, interior, light, modern, monitoring, office, prevention, privacy, private, protect, protection, rescue, safe, safety, secure, security, sensor, siren, smoke, subway, symbol, system, technology, train, transport, urban, view, wall, warning, watch, white,