cinder cleaning hole

例句：

1. 1. The cinder cleaning hole is a crucial part of the maintenance process.
   煤渣清理孔是维护过程的关键部分。
2. 2. The engineer used a special tool to clean the cinder cleaning hole.
   工程师使用一种特殊的工具来清理煤渣清理孔。
3. 3. The workers carefully removed the cinder from the cleaning hole.
   工人们小心翼翼地从清理孔中清除了煤渣。