Electro-hydraulic servo vavel的用法和样例：
例句
- This paper develops a direct-drive electrohydraulic servo valve of a completely new structure.
研制了一种全新结构的直接驱动电液伺服阀。 - 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。
