blade spring

例句：

1. 1. The new car has a blade spring that helps it accelerate quickly.
   这款新车有一个刀片弹簧，帮助它快速加速。
2. 2.The old clock had a blade spring that broke after a few hours.
   旧时钟有一个刀片弹簧，几个小时后就坏了。
3. 3.The spring in the door is broken; I need to replace it with a blade spring.
   门上的弹簧坏了；我需要用刀片弹簧来替换它。