grinding wheel bearing

例句：

1. 1. The machine's grinding wheel bearing is worn out.
   这台机器的磨削轮轴承已经磨损了。
2. 2.The engineer replaced the worn-out grinding wheel bearing with a new one.
   工程师用一个新的磨削轮轴承替换了磨损的轴承。
3. 3.The maintenance technician inspected the bearing for signs of wear.
   维护技术人员检查了轴承是否有磨损的迹象。