spiral nozzle的用法和样例：
例句
- A novel piezoelectric type nozzle flapper hydroelectric servo valve was developed and its control method was researched.
摘要提出了一种新型压电晶片型喷嘴挡板式电液伺服阀，并对其控制方法进行了研究。 - And what is more, for different nozzles, the length and width of the bubble cloud of the convergent-divergent nozzle are longer than those of the convergent-straight nozzle.
另外对于不同类型的喷嘴，缩放型喷嘴产生的空泡云长度比收敛型喷嘴所产生的长。
