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Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 4, pp. 112–113, July–August, 1970.
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Katanov, B.A. Some laws of bit wear in auger drilling of vertical boreholes. Soviet Mining Science 6, 461–462 (1970). https://doi.org/10.1007/BF02508901
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DOI: https://doi.org/10.1007/BF02508901