节俭的人；节约者。
节俭的人；节约者。；省煤器；锅炉中提高效率、节约燃料的热交换装置。；节约装置；[化] 节油器; 节热器; 省热器; 省煤器; 废气预热器; 废热锅炉
节俭的人；节约者。
A person who avoids waste
省煤器；锅炉中提高效率、节约燃料的热交换装置。
A heat exchange device in a boiler that improves efficiency and saves fuel.
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