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1·Water hydraulic directional valve;

纯水液压换向阀；

2·A new type of digital directional valve is presented.

给出了一种新型电液数字换向阀。

3·A proportional directional valve however will be controlled by an electrical device more like a dimmer switch.

一个比例方向阀是由与一个与调光开关非常象的电设备控制的。

4·So in effect the proportional directional valve is acting as both a directional valve and a flow control valve.

于是在实际上比例阀可以同时作为方向阀和流量阀来使用。

5·The model DL-8 multiple directional valve can also be used in hydraulic systems in other engineering machinery.

8型多路阀还可以应用于其它工程机械的液压系统中。

6·The performance of the water hydraulic directional valve can achieve the level of traditional oil hydraulic directional valve.

研制的纯水换向阀的性能基本达到了现有同类油压换向阀的水平。

7·This paper puts forward the method of intelligent compensation of dead zone in electrohydraulic proportional directional valve.

本文提出了电液比例方向阀死区的一种智能补偿方法。

8·The construction of concentric bi-directional valve overcomes the disadvantage of easy to connect between two parallel check valves.

同心双向阀结构克服了传统的单向阀并联结构两阀间易连通的缺点。

9·This paper introduces the features of a computer-controlled testing device for pneumatic directional valve and pneumatic system tests and measurements.

介绍一种采用计算机控制与检测气动换向阀试验台的特点和测试系统设计。

10·GDQ pneumatic high vacuum flapper valve USES solenoid directional valve to change the direction of air passage, controls the actuating cylinder to drive the valve opened closed.

GD Q气动高真空挡板阀是通过电磁换向阀改变气路方向，控制执行气缸驱动阀门作启闭运动。