sealing-in burner

例句：

1. 1. This new model of sealing-in burner is more energy-efficient than the previous one.
   这款新型密封式燃烧器比之前的更节能。
2. 2. Theengineers were working on a project thatrequired a sealing-in burner.
   工程师们正在研究一个需要使用密封式燃烧器的项目。
3. 3. The company has introduced anew type of sealing-in burner that can reduce emissions by up to50%.
   该公司推出了一种新型的密封式燃烧器，其排放量可减少高达50%。