magnification ratio — кратность увеличения
ratio of dimensions — соотношение размеров
variable reduction ratio — масштаб уменьшения
starting current ratio — кратность пускового тока
high reduction ratio — большая кратность уменьшения
English-Russian big polytechnic dictionary. 2014.
Class-size reduction — As an education reform, the broad goal of class size reduction (CSR) is to increase the number of individualized student teacher interactions intended to improve student learning. A reform long holding theoretical attraction to many… … Wikipedia
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