energy-saving principle的用法和样例：
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.
介绍了进气预旋调节的节能原理及进气预旋调节装置的应用范围和使用方法。 - The principle of the equipment of transducer is introduced, as well as the notice of the energe-saving of the injection machine.
介绍了变频调速节能装置的节能原理，注塑机节能改造的注意事项。
