economizer的复数形式怎么写？

Fuel economizer is placed on the back part of the boiler.省煤器布置在锅炉后部.Represents the control discrimination methods of air economizer and their applicability.给出了空气节能器的判别控制方法及各方法的适用地区.Economizer leakage is a main problem in...

economizer的音标：economizer的英式发音音标为：[i:'kɒnəmaɪzə]economizer的美式发音音标为：[ɪ'kɒnəˌmaɪzə]...

n.节约者，节约装置，经济家...