fixed-area nozzle

例句：

1. 1.The fixed-area nozzle is designed to deliver a precise amount of water.
   该固定区域喷嘴设计用于精确输送水量。
2. 2.The fixed-area nozzle was used in the manufacturing process to control the temperature.
   在生产过程中，固定区域喷嘴被用来控制温度。
3. 3. The fixed-area nozzle was replaced with a new model that had better performance.
   旧型号的固定区域喷嘴被一款性能更好的新型号所取代。