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Translated from Khimicheskoe i Neftyanoe Mashinostroenie, No. 1, p. 37, January, 1970.
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Amdur, M.A. Automatic drill bit inspection and marking line. Chem Petrol Eng 6, 74–75 (1970). https://doi.org/10.1007/BF01144652
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DOI: https://doi.org/10.1007/BF01144652