Ключевые слова: accident, alert, attention, background, banner, building, careful, caution, clean, cleaner, cleanup, danger, dangerous, equipment, fall, floor, hazard, housekeeping, icon, information, interior, janitor, label, lobby, maintenance, message, nobody, object, office, plastic, precaution, risk, safety, service, sign, signal, slide, slip, slippery, stairs, stand, surface, symbol, text, toilet, tool, warning, wet, work, yellow,