cylindrical balance spring

例句：

1. 1. The new car has a cylindrical balance spring that helps it run smoothly.
   这款新车有一个圆柱形平衡弹簧，帮助它平稳运行。
2. 2.The old clock had a cylindrical balance spring that was worn out.
   旧时钟有一个圆柱形平衡弹簧，已经磨损了。
3. 3. The engineer used a cylindrical balance spring to adjust the weight of the machine.
   工程师使用一个圆柱形平衡弹簧来调整机器的重量。