Drawing on their practical experience, they designed an air-cooled diesel motor. 他们利用自己的实践经验，设计了一台气冷柴油机。
A vehicle, powered by a gasoline or diesel motor, having large heavily treaded tires, and used in mowing, farming, or other applications. 拖拉机一种以汽油或柴油发动机为动力的车辆，有巨大沉重的履带，用于割草，农耕或其他用途
