介绍了一种新型的压力先导控制伺服阀，该阀的功率放大级采用双阀芯结构代替传统单阀芯结构。
A new servovalve using a pressure control pilot state was introduced, which USES two spools instead of single spool in power magnifying stage.
在阀芯双运动自由度的基础上提出了一种流体伺服螺旋的概念。
Based on the idea of spool's two degree of freedom motion authors put forward a new concept of servo screw.
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