cut-out spring

例句：

1. 1. The cut-out spring in the door is a bit loose.
   门上的切出式弹簧有点松。
2. 2.The spring-type mechanism has been designed to last longer than traditional ones.
   这种弹簧机制设计得比传统机制更耐用。
3. 3.The spring-type lock is easy to install and maintain.
   这种弹簧锁安装和维护都很方便。