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Translated from Khimicheskoe i Neftyanoe Mashinostroenie, No. 7, pp. 29–30, July, 1973.
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Mikheles, Y.S. Primary recording of wage expenditures in pump construction. Chem Petrol Eng 9, 640–641 (1973). https://doi.org/10.1007/BF01174400
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DOI: https://doi.org/10.1007/BF01174400