Russian translation: при открывании (дискового затвора) нижняя кромка диска смещается в направлении потока
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08:49 Aug 31, 2014
English to Russian translations [PRO] Tech/Engineering - Engineering (general) / butterfly valves
English term or phrase: the lower disc-edge opening downstream.
Preferred installation position of butterfly valves is the shaft horizontal and the lower disc-edge opening downstream.