constant efficiency curves
constant efficiency curves
恒效率曲线
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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Presents the energy saving principle of a frequency-controlled pump and points out the applicability of the law of similitude for centrifugal pumps and the conception of constant efficiency curves.
阐述了循环 水泵变频调速的节能原理，提出 离心 水泵相似定律的适用性和等效率曲线概念。
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