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Translated from Gidrotekhnicheskoe Stroitel'stvo, No. 12, pp. 52–53 and 62, December, 1980.
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Khlopenkov, P.R. Inventions survey. Hydrotechnical Construction 14, 1294–1296 (1980). https://doi.org/10.1007/BF02305231
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DOI: https://doi.org/10.1007/BF02305231