preburner

例句：

1. 1. The preburner is designed to reduce the amount of fuel needed for combustion.
   预燃烧器的设计目的是减少燃烧所需的燃料量。
2. 2.The preburner was used to heat up the air before it was ignited.
   预燃烧器用于在点燃前加热空气。
3. 3.The preburner is essential for maintaining the temperature and pressure in the furnace.
   预燃烧器对于保持炉内的温度和压力至关重要。