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Translated from Khimicheskoe i Neftyanoe Mashinostroenie, No. 4, p. 44, April, 1974.
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Oliferov, V.V., Smirnov, M.L. Check valve. Chem Petrol Eng 10, 374 (1974). https://doi.org/10.1007/BF01145954
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DOI: https://doi.org/10.1007/BF01145954