double-header boiler

例句：

1. 1.The double-header boiler is a crucial component in the heating system.
   双层头锅炉是供暖系统的关键部件。
2. 2. The engineers were tasked with installing the double-header boiler at the new factory.
   工程师们被指派在新的工厂安装双层头锅炉。
3. 3.The double-header boiler provided efficient heat distribution throughout the building.
   双层头锅炉在整个建筑中提供了高效的热量分布。