后边加er，变成cooler，名词词性，意思是冷却器，例如：
1、Analysis on Frequency Control Technology Used in Transformer Cooler变压器用冷却器采用变频调速技术的分析
2、Development and application of a new cooler for emulsion matrix新型乳胶基质冷却器的研制与应用
3、The Design Gas Velocity Confirmed in the Cooler of High Temperature Gas某高温燃气冷却器设计燃气流速的确定
