Ключевые слова: accident, attention, background, bucket, business, caution, clean, cleaning, cleanup, commercial, danger, domestic, duties, floor, household, housework, hygiene, indoors, industrial, janitorial, job, mop, nobody, object, office, phrase, plastic, prevention, profession, professional, safety, sanitary, service, sign, slippery, stairs, symbol, tidy, trolley, warning, wet, workplace, yellow,