上升与下降电磁阀的控制；
防裂阀可防止油管破裂导致工作台失控下降的事故。
Crack resistant valve can prevent the oil pipe rupture resulting in table control falling accident.
安全阀可以防止因液压系统故障等原因而引起的油缸输出推（拉）力急骤下降，可确保加工安全。
The pressure safety devices can help to retain the draw bar pulling force in the event of a breakdown of the hydraulic system.
单缸前支前幅，重力下降，能耗低，进口平衡阀。
Single cylinder with imported balance valve for front support elevation hoist down by gravity low energy consumption.
某油田一天然气井的产量突然下降，经检查发现该井采气装置中的节流阀柱塞套断裂为三截，形成了两对断口。
The yield of a natural gas well in an oilfield dropped suddenly, which was due to the piston sheath of the choke valve breaking into three parts with two pairs of fractures after inspection.
第二，单流阀效应引起孔隙压力下降，割理闭合，导致侵入的压裂液滞留其中。
The second is unilateral flow bring about the pore press lower, cleats close, and fracturing fluid deeped in it will settle.
试验表明：安装催化转化器和二次空气供给阀后的二冲程摩托车的排放有了明显的下降。
The experimental results have shown that exhaust emissions from two stroke motorcycle with the catalytic converter and feeding valve for secondary air have been reduced obviously .
当水位下降后，主阀由浮球开关控制打开进水口向水池汪水，实现自动补水。
When the water level drops, the main valve is composed of a floating ball switch control to open the water inlet to the water tank, automatic replenishment.
当水池水面下降后，浮球阀重新开启，控制室水压下降，主阀再次开启继续供水，保持液面的设定高度。
When the water tank after falling, floating ball valve to open, the control room pressure drops, the main valve to open again to water, keep the level set height.
液面下降时，节流阀打开，升高时，节流阀关闭。
It throttles open on a lowering liquid level and throttles closed upon a rising liquid level.
石油和天然气工业。下降孔设备。地下安全阀设备。
Petroleum and natural gas industries - Downhole equipment - Subsurface safety valve equipment.
该安全阀使叉车或起重机的起升液压驱动回路既有高效率的上升速度，又有可靠的安全下降速度。
The safety valve can make the lifting fluid-pressure drive circuit of a fork lift truck or a crane obtain not only high efficiency ascending speed, but also reliable and safe descending speed.
采用可煽程控制器（PLC）直接控制电液数字方向流量阀，可使液压系统的控制系统简洁、可靠、成本显著下降。
Direct control of electro hydraulic digital direction & flow valve by means of PLC can make the control system of hyd. system become simpler, cheaper and reliabler.
当储罐喷放一次后，其中的压力迅速下降，使调压阀自动开启。
After one-time spraying of the tank, the pressure inside falls quickly and the pressure-adjusting valve starts automatically.
除此之外，在阀坚持最大开度时期，三种调理阀的充汽流量都阅历了一个近似线性的下降进程；
In addition, opening the valve to maintain the maximum period, three full steam flow control valve has undergone a similar process of linear decline;
由于导阀系统排水量大于针阀的进水量，主阀控制室压力下降。
As guided needle valve system is greater than the amount of water displacement, the main valve pressure drop in the control room.
由于导阀系统排水量大于针阀的进水量，主阀控制室压力下降。
As guided needle valve system is greater than the amount of water displacement, the main valve pressure drop in the control room.
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