Ключевые слова: abstract, ac, aged, air, architecture, backdrop, background, backgrounds, blue, building, climate, conditioner, conditioning, construction, cool, cover, decoration, design, dirty, duct, electric, equipment, frame, grate, gray, grid, grille, grunge, grungy, illustration, industrial, metal, old, paint, pattern, rough, square, steel, striped, surface, texture, textures, vent, ventilation, ventilator, vintage, wall, weathered, wind, window,