furnace bottom block

例句：

1. 1. The furnace bottom needs to be cleaned regularly to prevent the fire from spreading.
   定期清理炉底以防止火势蔓延。
2. 2.The furnace bottom is made of high-quality steel, ensuring long service life.
   炉底采用优质钢材制造，确保使用寿命长。
3. 3. The furnace bottom block is a crucial component in the furnace's operation, affecting its efficiency and safety.
   炉底块是炉子运行的关键部件，影响其效率和安全性。