grate shaft

例句：

1. 1. The machine needs to be adjusted to ensure the proper grate shaft alignment.
   机器需要调整以确保适当的磨削轴对齐。
2. 2.The engineer designed a new grate shaft that would improve efficiency.
   工程师设计了一种新的磨削轴，以提高效率。
3. 3.During maintenance, the technician found that the grate shaft was damaged and needed replacement.
   在维护期间，技术人员发现磨削轴受损并需要更换。