Ключевые слова: alarm, alert, ambulance, art, attention, blue, call, contour, danger, emergency, equipment, extinguish, extinguisher, fire, firefighter, flame, flasher, flat, glowing, handbell, icon, illustration, isolated, jingle, light, line, linear, lineart, medical, message, neon, notification, object, outline, police, protection, red, reminder, ring, ringing, safety, security, sign, simple, sound,