filling slot ball bearing

例句：

1. 1.The engineer used a special filling slot to install the new ball bearings.
   工程师使用特殊的填充槽来安装新的球轴承。
2. 2.The machine's efficiency is greatly improved by using high-quality ball bearings.
   使用高质量的球轴承大大提高了机器的效率。
3. 3.The technician carefully checked each component for proper alignment and fit before installing the ball bearings.
   技术员仔细检查每个组件，确保正确对齐和适配，然后安装球轴承。