Short description: In Russian. Orlov, Ivan Semenovich. Cleaning Boiler Units of External and Internal Pollution. Leningrad: Gosenergoizdat, 1953. Ochistka kotel'nykh agregatov ot naruzhnykh i vnutrennikh zagryazneniy. In Russian /Cleaning of external and internal pollution from boiler units . The image is provided for reference only. It may reflect condition of one of the available copies or only help in identifying the edition. Please feel free to contact us for a detailed description of the copies available. SKU5855801