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Translated from Khimicheskoe i Neftyanoe Mashinostroenie, No. 8, pp. 31–32, August, 1972.
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Shishkin, A.A. Investigating the effect of technological factors on the quality of pipeline shutoff valves. Chem Petrol Eng 8, 753–754 (1972). https://doi.org/10.1007/BF01136971
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DOI: https://doi.org/10.1007/BF01136971