As important directionalcontrolvalve, direction valve is used to control the direction of movement part.
换向阀作为重要的方向控制阀，用来实现运动部件的方向控制。
2
When a set of Hydraulic Elevators are used, then a hydraulic supply from a directionalcontrolvalve is required.
当使用一套液压提升集时，那么一个提供液压动力的方向控制阀是必需的。
3
In pneumatic position servo system with proportional directionalcontrolvalve and control cylinder, the centre adjust emt voltage is one of the important factors that influence control precision.