fuel saving device

例句：

1. 1. The new car has a fuel saving device that reduces fuel consumption by up to 20%.
   这款新车配备了一个节油装置，可减少燃油消耗高达20%。
2. 2. The government is promoting the use of fuel saving devices in public transportation.
   政府正在推广使用公共交通运输中的节油装置。
3. 3. The engineer designed a fuel saving device for the factory's production line.
   这位工程师为工厂生产线设计了一个节油装置。