Ключевые слова: accident, advertisement, aged, alarm, alert, attention, background, beware, black, business, careful, caution, company, construction, danger, direction, dirty, emergency, escape, exit, exit sign, floor, grunge, industrial, industry, information, label, metal, old, passage, prevention, protection, rescue, risk, rust, safe, safety, safety icon, secure, security, sign, signboard, steel, symbol, table, urgency, warning, warning sign, way, yellow,