Ключевые слова: abandoned, architecture, building, candle, ceiling, circulation, concept, concrete, construction, corridor, dark, deep, digger, dirty, duct, ducting, ductwork, engineering, exploring, factory, gray, heat, heating, industrial, industry, inside, light, line, mechanical, metal, modern, passage, pipe, pipeline, round, rusty, sewer, steel, subterranean, system, technology, temperature, tube, tunnel, underground, urban, urbex, ventilation, voronezh, warm,