Ключевые слова: 3d, 911, accident, alarm, ambulance, assistance, background, blue, button, call, color, colorful, communication, concept, contact, danger, department, design, emergency, fire, first, flat, health, help, hospital, hotline, icon, illustration, isolated, medical, mobile, phone, pink, police, render, rendering, rescue, safety, security, service, sign, smartphone, sos, support, symbol, technology, telephone, warning, web,