Ключевые слова: alarm, alert, attention, background, beacon, blurred, caution, ceiling, color, control, danger, design, electronic, emergency, equipment, evacuate, fire, flash, flashing, hole, home, indoors, isolated, light, modern, monoxide, nobody, object, professional, protection, rescue, round, safety, security, sign, signal, simple, siren, smoke, sound, sounder, sweden, system, technology, threat, traffic, urgency, warn, warning, white,