Ключевые слова: 911, alarm, ambulance, art, background, burn, button, cabinet, call, color, colorful, contour, danger, department, emergency, equipment, extinguish, extinguisher, fire, firefighter, flame, foam, gradient, help, hose, icon, illustration, isolated, line, linear, lineart, mobile, number, object, outline, phone, police, protection, red, reel, rescue, safety, security, service, sign, smartphone, symbol, telephone, vector, water,