fixed bearing

例句：

1. 1. The machine has a fixed bearingthat makes it easy to move around theroom.
   这台机器有一个固定的轴承，使得它可以轻松地在房间内移动。
2. 2.The engineer had to fix the bearing inthe gear before he could start the machine.
   工程师必须在启动机器之前修复齿轮中的轴承。
3. 3. The new design uses a fixed bearingsystem that reduces vibration and noise.
   新设计采用了一种固定轴承系统，以减少振动和噪音。