The three most important effects of an electric current are heating, magnetic and chemical effects.
电流三种最重要的效应是热效应、磁效应和化学效应。
General to add water to go through three stages of heating boiler, i. e.
一般给锅炉加水要经过三个加热阶段，即：给水被加热成饱和水；
General to add water to go through three stages of heating boiler, i. e.
一般给锅炉加水要经过三个加热阶段，即：给水被加热成饱和水；
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