circular grate for pellet firing

例句：

1. 1. The pellet firing system uses a circular grate to distribute the pellets evenly across the firing chamber.
   颗粒发射系统使用一个圆形格栅来均匀地将颗粒分布在发射腔内。
2. 2. The engineer designed the circular grate to ensure efficient heat transfer during the firing process.
   工程师设计了圆形格栅，以确保在燃烧过程中高效传热。
3. 3. The circular grate is made from high-quality steel and is resistant to wear and tear, ensuring long lifespan.
   圆形格栅由优质钢材制成，耐磨损，确保了较长的使用寿命。