Ключевые слова: air, allergic, bacteria, breath, care, clean, close, closeup, cold, conditioner, conditioning, construction, contaminate, cooler, dirt, dirty, duct, dust, dusty, electronic, equipment, filter, hand, home, hot, house, hygiene, illness, improvement, indoor, industry, maintenance, nobody, nose, object, old, pollution, remove, repair, service, sick, sleep, technology, unclean, vent, ventilation, wall, wash, white, worker,