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Translated from Khimicheskoe i Neftyanoe Mashinostroenie, No. 9, pp. 33–34, September, 1984.
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Neupokoev, V.G., Chernik, A.A. Guarantee parameters for the quality of drilling bits (discussion). Chem Petrol Eng 20, 461–463 (1984). https://doi.org/10.1007/BF01166117
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DOI: https://doi.org/10.1007/BF01166117