Ключевые слова: accident, aid, alert, attention, background, badge, banner, beware, bubble, business, care, careful, caution, concept, construction, danger, dangerous, design, emergency, engineer, first, health, helmet, help, icon, illustration, industrial, injury, isolated, job, label, message, prevention, protect, protection, red, regulation, risk, safe, safety, secure, security, sign, speech, symbol, warn, warning, work, yellow,