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Translated from Khimicheskoe i Neftyanoe Mashinostroenie, No. 6, pp. 26–27, June, 1969.
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Kostenkov, G.P. The effect of stamping upon the mechanical properties of bit legs. Chem Petrol Eng 5, 470–471 (1969). https://doi.org/10.1007/BF01136457
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DOI: https://doi.org/10.1007/BF01136457