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Inventor's Certificate No. 1,333,921 USSR, MKI F 16 K 15/03, Check valve.
Inventor's Certificate No. 892,079 USSR, MKI F 16 K 1/16, Flap valve.
Inventor's Certificate No. 1,657,816 USSR, MKI F 16 K 1/16, Flap valve.
Translated from Khimicheskoe i Neftyanoe Mashinostroenie, No. 4, pp. 9–11, April, 1992.
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Kryzhanovskii, O.G. Prospects of developing compound flap valves. Chem Petrol Eng 28, 225–228 (1992). https://doi.org/10.1007/BF01148607
- Flap Valve
- Compound Flap