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Additional information
Translated from Izmeritel'naya Tekhnika, No. 2, pp. 32–34, February, 1991.
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Levin, B.M., Lopatin, A.N. & Lopatina, I.M. Use of converging tube sections of noncircular penstocks for flow rate measurement by the velocity-area method. Meas Tech 34, 167–171 (1991). https://doi.org/10.1007/BF00990824
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DOI: https://doi.org/10.1007/BF00990824