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Translated from Khimicheskoe i Neftyanoe Machinostroenie, No. 6, pp. 36–37, June, 1977.
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Akhadov, G.G., Godzhaev, S.M. New technology for the fabrication of billets for the cores of the pistons of drilling pumps. Chem Petrol Eng 13, 554–556 (1977). https://doi.org/10.1007/BF01144325
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DOI: https://doi.org/10.1007/BF01144325