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Translated from Khimicheskoe i Neftyanoe Mashinostroenie, No. 11, p. 2, November, 1992.
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Shershabov, I.V. Safety valve. Chem Petrol Eng 28, 638–639 (1992). https://doi.org/10.1007/BF01150915
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DOI: https://doi.org/10.1007/BF01150915