metal heat exchanger

例句：

1. 1.The new metal heat exchanger is more efficient than the old one.
   新型金属换热器比旧的更高效。
2. 2.The engineer designed a metal heat exchanger to improve the efficiency of the cooling system.
   工程师设计了一个金属换热器来提高冷却系统的效率。
3. 3. The metal heat exchanger was used in the industrial process to transfer heat between two fluids.
   金属换热器在工业过程中用于两种流体之间的热量传递。