柯林斯词典air brake (air brakes) 1. N-COUNT Air brakes are brakes that are used on heavy vehicles such as buses and trains and that are operated by means of compressed air. 氣牐; 空氣制動器 返回 air brake剑桥词典a brake operated by air pressure , used on large vehicles such as buses and trains （公共汽車、火車等的）氣牐，空氣制動器 返回 air brake