使节流

For high-speed flow of medium, open the gate in local conditions can cause the vibration Cast Gate, Globe, Check Valves of the gate, but they may damage the vibration damper and the valve seat sealing surface, while the throttling damper will suffer erosion of the medium.

对于高速流动的介质，闸板在局部开启状况下可以引起闸门的振动，而振动又可能损伤闸板和阀座的密封面，而节流会使闸板遭受介质的冲蚀。

The process of vapor pressure reducing was achieved through decompression valve and throttling disk. Centrifugal nozzles were installed along the circumference to makewater sprayed more uniform and atomization effect better. The atomization could be optimized and heat transfer between water and vapor was intensified in Ventri. The airproofed-baffle and the holes at the outlet of mixed-pipe, prevented droplet with bigger diameter from entering the turbine, and thus protected the vanes.

减压阀与节流孔板相配合，实现对高压蒸汽的降压过程；离心式喷嘴环形布置，使喷水均匀，雾化效果好；文丘利管的使用，进一步优化了减温水的雾化效果，强化了汽水间的传热效果；混合管出口设置密封挡板和出流孔，阻止了直径较大的水滴进入汽轮机，保护了叶片。

On the base, the author designs three structures: in vacuum, heat conduction and spout and makes the experiment device of the cryoprobe system. After repeating experiment, dry ice jam is overcome via adding a mid-heater.

在实验过程中提出增加中间加热容器的方法，使液体CO_2在节流过程中避免进入固体、蒸气两相区，创新性的解决了干冰堵塞问题，为冷冻刀提供连续可靠的冷源。

The valve core dynamic fixed flow balancing valves is compossed of pistons with changeable flow area,hi-presision(±5%)springs and sustaining devices. Affected by differential pressure and springs,the flow nipple will do piston movement.During the movement,the fliw area changes and the flow rate sustains at a constant value.

动态流量平衡阀的阀芯是由可变过流面积的阀胆和高精度（±5%）弹簧及支撑装置组成，受压差和弹簧的作用，阀胆的节流嘴可在阀胆罩内做活塞式往复运动，运动过程中流通面积发生改变，从而使流量维持在恒定值。

Finally the totalizers contact with the PC by RS-485 bus to form a distributed measuring network. The spindle flowmeter and the especially designed totalizer highly improve the precision of measurement, and the measuring system made up of them is very easy to use.

采用纺锤体流量计作为测量前端，成功的解决了传统节流装置测量精度低、压力损失大等缺陷，配以专用的积算仪系统，不仅避免了通用变送器与通用积算仪之间多次A/D、D/A转换所造成的精度损失，提高了测量精度，还简化了系统结构，使仪表的安装更加方便，具有很高的实用价值。

Valve is the use of diaphragm, spring, piston and other sensitive components to change the valve clearance between the valve and valve seat, when the medium when produced by throttling, the pressure drop and its decompression valve.

减压阀是利用膜片、弹簧、活塞等敏感元件改变阀瓣与阀座之间的间隙，当介质通过时产生节流，压力下降而使其减压的阀门。

An experimental system of pressure regulator characteristic is introduced.

减压器是利用节流原理工作的部件，其作用是使进口的高压气体的压力降至规定的值，并稳定在一定的压力范围内。

The controller controls the velocity of swing motor by the means of meter-in to track the output velocity of rotary stage of the optimal regulator, so that the load sway can be controlled during swing operation.

最后，本文设计了回转液压回路模糊控制器，以换向阀节流调速的方式对液压马达转速进行模糊控制，使起重机回转平台跟踪最优调节器输出的转速，实现对吊重摆振的控制。

METHODS: According to the characteristics of hydraulic fluids and processing technology, new type of micro-structure of the digital throttle and unique structure of the two-cylinder piston had been applied to the damper.

该阻尼缸根据液压流体特性和加工工艺设计，通过采用了一种新型微结构数字节流阀以及独特的双活塞液压缸结构，可以实现膝关节伸展与屈曲的双向自动控制，从而使改善假腿步态的对称性。

METHODS: According to the characteristics of hydraulic fluids and processing technology, new type of micro-structure of the digital throttle and unique structure of the two-cylinder piston had been applied to the damper. It could control extension and flexion of the knee joint in two-way automatically, which improved the gait symmetry of artificial limb.

该阻尼缸根据液压流体特性和加工工艺设计，通过采用了一种新型微结构数字节流阀以及独特的双活塞液压缸结构，可以实现膝关节伸展与屈曲的双向自动控制，从而使改善假腿步态的对称性。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。