top bearing cover

例句：

1. 1.The top bearing cover is designed to protect the engine from dust and debris.
   顶部承载盖的设计旨在保护发动机免受灰尘和碎片的侵害。
2. 2. The top bearing cover was replaced after a few months of use.
   使用几个月后，顶部承载盖被更换了。
3. 3.The top bearing cover is crucial for maintaining the engine's performance.
   顶部承载盖对于保持发动机性能至关重要。