Ключевые слова: accident, aid, alarm, assist, assistance, communication, concept, conceptual, critical, design, disaster, emergency, equipment, health, help, importance, indoor, insurance, interior, letter, lifesaver, marks, our, outdoor, problem, protect, red, rescue, ring, risk, safe, save, security, service, shape, sign, signage, signal, sos, souls, stroke, support, symbol, urgency, urgent, warning,