ball and roller bearing

例句：

1. 1. The ball androller bearings are essential for the smoothoperation of the machine.
   球和滚轮轴承对于机器的平稳运行至关重要。
2. 2. The engineercarefully inspected the ball and roller bearings before installing them in the machine.
   工程师在安装机器之前仔细检查了球和滚轮轴承。
3. 3. The ball and roller bearings were replaced after a few months ofuse due to wear and tear.
   由于磨损，几个月后更换了球和滚轮轴承。