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Translated from Khimicheskoe i Neftyanoe Mashinostroenie, No. 9, p. 38, September, 1977.
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Grazhis, A.V. Unit with planetary rotation of drums for working valve plates. Chem Petrol Eng 13, 834 (1977). https://doi.org/10.1007/BF01136310
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DOI: https://doi.org/10.1007/BF01136310