bottom collector

例句：

1. 1. The bottom collector is responsible for collecting waste from the bottom of the tank.
   底部收集器负责从水箱底部收集废物。
2. 2. The bottom collector was designed to prevent water from flowing back into the system.
   底部收集器被设计成防止水回流到系统中。
3. 3. The bottom collector was replaced after it failed to function properly.
   底部收集器在功能不正常后被更换了。