Excessive air factor is an important parameter of operation status of burning process. Reasonable determination of excessive air factor has significant effect on increasing energy efficiency.
过量空气系数是燃烧过程运行情况的一个重要参数，合理确定过量空气系数对于提高能源利用率有很大意义。
Coupling coefficient (k) of a transformer is a key parameter affecting the efficiency of a contactless energy transmission system.
在非接触电能传输系统中，变压器的耦合系数直接关系到系统的变换效率。
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