energy-saving principle的用法和樣例：
例句
- This paper introduced the energy saving principle of air intake prerotation adjustment and the application area and method of air intake prerotation regulator.
介紹了進氣預旋調節的節能原理及進氣預旋調節裝置的應用範圍和使用方法。 - The principle of the equipment of transducer is introduced, as well as the notice of the energe-saving of the injection machine.
介紹了變頻調速節能裝置的節能原理，注塑機節能改造的注意事項。
