furnace top bell

例句：

1. 1.The furnace top bell was a crucial part of the process.
   炉顶钟是这一过程的关键部分。
2. 2.The clock on the furnace top bell was always accurate.
   炉顶钟上的钟表总是准确的。
3. 3.The engineer carefully inspected the furnace top bell to ensure it was functioning properly.
   工程师仔细检查了炉顶钟，确保它正常工作。