These formula are suitable for various designs of correctors with single -, multi-stage series in leading, lagging and lagging-leading.
这些公式适用于单级及多级的串联超前、滞后以及滞后——超前等各种校正器的设计。
Pumps of the series SPP/SPV are single-stage mixedflow pumps, adopted open impeller and back pull-out design. They are available in both horizontal and vertical design.
SPV系列泵是单级混流泵，采用开式叶轮，后拉出式设计，可以提供卧式（SPP）和立式（SPV）两种型式。
To make hot water turbines applicable for practical purposes, a series of tests, such as isolated tests of nozzles, buckets and single stage turbines, have been conducted.
为了使热水透平应用于实际，进行了喷嘴单独试验、动叶单独试验与单级热水透平试验等一系列试验。
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