boiler grate

例句：

1. 1.The boiler grate is a crucial part of the heating system.
   锅炉格栅是供暖系统的关键部分。
2. 2. The engineer inspected the boiler grate and found no signs of wear.
   工程师检查了锅炉格栅，没有发现磨损的迹象。
3. 3. The old boiler grate was replaced with a new one to improve efficiency.
   为了提高效率，更换了旧的锅炉格栅。