Ключевые слова: abstract, air, architecture, background, black, building, closeup, construction, cover, design, detail, duct, equipment, exterior, flow, frame, grid, grill, grille, hole, industrial, industry, iron, line, material, metal, metallic, modern, object, pattern, rectangular, steel, structure, surface, system, technology, texture, textured, vent, ventilated, ventilation, wall, weathered, white,