• 1. differential engine: 差分机 | 交转式发动机
• 2. engine oil filter differential pressure: 发动机机油滤清器压差
• 3. engine fuel filter differential pressure: 发动机燃油滤清器压差

• 1.Besides dispensing with the traditional engine bay on a car, hub motors save space and weight because there is no need for a mechanical transmission, with its driveshafts and differential units.
  除了不需在汽车上配置传统发动机舱，由于轮毂电机不需要机械传动(一般有传动轴和差别单位)，轮毂电机能节省汽车空间并减少重量。
  dict.yoduao.com
• 2.Normally you have an engine or motor going through a differential.
  通常你有一个引擎或者电机来带动差速器。
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• 3.The switch provides a low-pressure differential signal to the engine control system.
  此开关为引擎控制系统提供一个低压差动信号。
  dict.yoduao.com

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