Ключевые слова: brown, buffing, business, busy, caucasian, chemical, clean, clean commercial, cleaner, cleanliness, commercial, copy space, corridor, detergent, dirty, dust, employed, equipment, floor, floor machine, green, hall, indoors, industrial, job, machine, man, marble, occupation, office, person, polisher, polishing, professional, professional occupation, public, sand, self, square, thai, wash, washing, water, wet, white, working,