Ключевые слова: abstract, air, allergy, appliance, background, black, blade, blades, circle, clean, close, closeup, cold, conditioner, conditioning, cool, cooling, cover, dangerous, design, dirt, dirty, disease, dust, electric, electricity, equipment, fan, grating, grille, health, home, house, industrial, isolated, metal, object, old, pattern, power, propeller, retro, round, steel, technology, texture, ventilation, white, wind,