- specific head
- 比压头
English-Chinese dictionary of mechanical engineering (英汉机械工程大词典). 2013.
specific head
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Specific storage — (Ss), storativity (S), specific yield (Sy) and specific capacity are material physical properties that characterize the capacity of an aquifer to release groundwater from storage in response to a decline in hydraulic head. For that reason they… … Wikipedia
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specific — [adj] particular, distinguishing bull’s eye*, categorical, characteristic, clean cut, clear cut, cut fine*, dead on*, definite, definitive, different, distinct, downright, drawn fine, especial, exact, explicit, express, flat out*, hit nail on… … New thesaurus
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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
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