direction finder; direction control valve; di ... 测向仪器差 instrument errors of direction finder ..
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hydraulically operated direction control valve 液压操纵的方向控制阀
elevator direction control valve 起重机方向控制阀
direction control valve operation 转向控制阀的工作
spring-centered direction control valve 弹簧对中的方向控制阀
direction control valve spool 转向控制阀阀芯
centered direction control valve 弹簧对中的方向控制阀
PROPORTIONAL DIRECTION CONTROL VALVE Rexroth-A 件
spring centered direction control valve 弹簧对中的方向控制阀
Wherein the control pressure is called pressure control valve to control the flow of known flow control valve to control flow through ﹑ called off and the direction control valve.
其中控制压力的称为压力控制阀，控制流量的称为流量控制球阀，控制通﹑断和流向的称为方向控制球阀。
When the control valve when the reverse, so that both fluid along the direction of movement of spool when closed, the flow control valve capacity will be increased.
当调节阀反向使用时，既流体沿着使阀芯关闭的方向流动时，调节阀的流通能力会增大。
The proportional direction valve and the proportional relief valve were adopted to timely control the belt tension and its working principles were introduce.
分别采用比例方向流量阀和比例溢流阀来实时控制输送带张力，并分别介绍了其工作原理。
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