- total head efficiency
- Газовые турбины: к.п.д. по полным параметрам, кпд по полным параметрам
Универсальный англо-русский словарь. Академик.ру. 2011.
total head efficiency
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Specific speed — Pump Specific Speed is an index that, in mechanical terms, represents the impeller speed of a pump necessary to generate 1 gallon per minute at 1 foot of head.Ns = (n*sqrt(Q)) / (gH^(3/4))Ns = specific speed (unitless)n = pump rotational speed in … Wikipedia
