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“Pneumatic-chamber pump for unloading boxcars,” Information List, Orenburg Scientific and Technical Information Center (TsNTI) (1982), p. 3.
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Inventor's Certificate No. 1,707,236 USSR, International Patent Classification 5F04-B47/00, “Self-cleaning well pump filter.”
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Translated from Khimicheskoe i Neftyanoe Mashinostroenie, No. 4, pp. 6–7, April, 1993.
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Koshtorev, N.I. New developments from the Central Scientific-Research Laboratory “Orenburgneft”. Chem Petrol Eng 29, 160–161 (1993). https://doi.org/10.1007/BF01152253