directional valve meaning in Chinese

定向阀
方向阀

Hydraulic fluid power . multiple directional valve . requirements
液压多路换向.阀技术条件
Hydraulic fluid fower . multiple directional valve . test methods
液压多路换向阀.试验方法
Hydraulic fluid power - solenoid operated directional valve
液压电磁换向阀
The fault study of pilot valve in magnetic directional valve
电磁换向阀中先导阀的故障分析
Based on state space method of modern control theory , the mathematical model for the two way / two position hydraulic operated directional valve in thread cartridge is established
摘要基于现代控制理论的状态空间法，建立了螺纹插装式液控换向阀开、闭过程的动态特性数学模型。