The reverse flow, from developed to developing countries, is on the rise, too.
从发达国家到发展中国家的反向流动也在增加。
The check valve plays an important role to prevent the reverse flow in high pressure system.
止回阀在高压系统中起着关键的防逆流作用。
Requirement: Valve must be tight against reverse flow.
要求：这种阀门对于回流必须密封紧密。
The reverse flow region is observable near the pipe wall.
管壁附近存在明显的回流再附区；
Use a check valve to prevent reverse flow into the cylinder.
采用止回阀，防止回流入钢瓶。
For the hydraulic system to prevent reverse flow of oil flow.
用于液压系统中防止油流反向流动。
Purpose: To test valve No. 1 for tightness against reverse flow.
目的：检测1号止回阀对于回流的密封性。
Purpose: To test check valve No. 2 for tightness against reverse flow.
目的：检测止回阀2号对于回流的密封性。
Never reverse flow through a regulator or rely upon it to act as a check valve.
禁止通过调整器倒流或依靠它作为止回阀。
Precision machined tilting disc and seat for tight shutoff in reverse flow direction.
精密机加工的倾斜式阀瓣和阀座，适用于逆流的紧密关闭。
Requirements: Valve must be tight against reverse flow under all pressure differentials.
要求：在所有压差下，阀门对于回流必须是密封的。
Annular reverse flow zone can be found too in the combustor with the flat-straight slag baffle.
简单环形挡渣板也能产生环形回流区，在旋风燃烧室设计中可取代锥形缩口挡渣板。
The float shoe prevents reverse flow, or U-tubing, of cement slurry from the annulus into the casing.
浮鞋能够防止环空中的水泥浆向套管内流动这种回流或者U型管效应的发生。
Conclusion The two routes of venous reverse flow in reverse-flow island flap coexist and complement e...
结论逆行血供皮瓣中静脉逆流的“迷宫式途径”和“瓣膜失效途径”是共同存在、互为补充的。
Outlet subcooling degree of reverse flow section should be in conformity with the requirement of HEI Standard.
空冷器设计应注意其逆流段出口的过冷却符合HEI标准的要求；
The variation of local friction coefficient is similar to velocity and local minimum value occurred in reverse flow area.
摩擦阻力的变化趋势与速度类似，在产生逆向流处出现局部极小值。
Objective: to develop a method for extension of the Posterior interosseous reverse flow flap and to im - prove its reliability.
目的：提出一种延长骨间背侧逆行皮瓣和增加其可靠性的方法。
The mathematics model was established based on flow characteristics of reverse flow diverters (RFD) by the using of energy equation.
针对压冲流体在可逆流体换向装置(RFD)中的流动特性，以能量方程为基础建立数学模型。
On gas withdrawal systems, use a check valve or other protective apparatus in any line or piping from the container to prevent reverse flow.
对于气体排出系统，使用止回阀或其它保护性装置以防止回流。
Series 709 Double Check Valve Assemblies are designed to prevent the reverse flow of polluted water from entering into the potable water system.
系列709双止回阀总成适用于防止受到污染的水回流进入到饮用水系统中。
RESULTS: the reverse flow were detected at the mitral valve orifice of left atrium, at the opposite of which in left atrium the front flow were also detected.
结果：在观察到二尖瓣口左房侧负向血流的同时，在其左房的相对面可测到前向性血流。
Use a pressure reducing regulator or separate control valve to safely discharge gas from cylinders. Use a check valve to prevent reverse flow into the cylinder.
使用减压调整器或单个的控制阀来安全地从钢瓶中排出气体。采用止回阀，防止回流入钢瓶。
Induced by the high-speed feed jet flow, the solid particles above the feed nozzle tended to flow down, and a reverse flow zone was formed along the riser wall.
受喷嘴区高速射流的影响，喷嘴上方固体颗粒呈向下流动趋势，形成一个诱导回流区域。
A float collar is placed at the top of the float joint and a float shoe placed at the bottom to prevent reverse flow of cement back into the casing after placement.
浮箍是放置于浮动接头之上的，而浮鞋则是放置于浮动接头之下，以防止水泥浆回流到套管内。
For natural circulation, it is shown that parallel flow in the tubes of vertically inverted U-tube team generator (UTSG) can be non-uniform, and reverse flow occurs within some tubes.
自然循环条件下，立式倒u型管蒸汽发生器(UTSG)并联倒u型传热管内存在非均匀流动，部分传热管出现倒流。
By reducing the reverse flow in chamber and by increasing resistance difference of back-and-forth flow, higher efficiency, higher pressure and less output fluctuation could be expected.
通过减小腔内回流比例、增大正反方向流阻差，提高泵液效率与输出泵压、减小输出脉动。
When the pressure difference changes with time, a phase shift will occur between the transient pressure difference and displace of valve flap, which could cause leakage and even reverse flow.
当阀片两侧的压差随时间变化时，阀片的启闭与压差的变化之间存在一定的相位差，有可能引起泄漏甚至反向流动。
When the pressure difference changes with time, a phase shift will occur between the transient pressure difference and displace of valve flap, which could cause leakage and even reverse flow.
当阀片两侧的压差随时间变化时，阀片的启闭与压差的变化之间存在一定的相位差，有可能引起泄漏甚至反向流动。
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