bottom end cover

例句：

1. 1. The car's engine is protected by a bottom end cover.
   这辆车的发动机被一个底部端盖保护着。
2. 2.The engineer carefully removed the bottom end cover to inspect the inner workings.
   工程师小心翼翼地移除了底部端盖，以检查内部结构。
3. 3. The manufacturer claims that their product has a superior bottom end cover design.
   制造商声称他们的产品拥有更优越的底部端盖设计。