Ключевые слова: abstract, aged, air, architecture, backdrop, background, brown, building, closeup, concrete, conditioner, conditioning, construction, cooling, design, dirty, filter, frame, grate, gray, grid, grill, grille, grunge, grungy, hole, industrial, industry, iron, mesh, metal, metallic, modern, old, pattern, plate, rough, rust, rusty, sheet, steel, structure, surface, texture, textured, vent, ventilation, vintage, wall, weathered,