Ключевые слова: ancient, chimney, conduit, corrode, corroded, corrosion, day, daytime, decrepit, degradation, depletion, deterioration, dilapidated, dilapidation, duct, flue, frayed, grime, iron, metal, old, outworn, pipe, pipeline, piping, ramshackle, rust, rusty, soot, steel, stovepipe, threadbare, tube, tubing, tumbledown, wear, white, worn,