fixed tube-sheet exchanger

例句：

1. 1.The fixed tube-sheet exchanger is a crucial component in the cooling system.
   固定管板换热器是冷却系统中的一个关键部件。
2. 2. The design of the fixed tube-sheet exchanger has been optimized for better heat transfer efficiency.
   固定管板换热器的设计已经优化，以提高热传递效率。
3. 3.The fixed tube-sheet exchanger is used to remove heat from the exhaust gases before they are released into the atmosphere.
   固定管板换热器用于在将废气排放到大气之前去除其中的热量。