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the selection of primary air fan and secondary air fan 一、二次风机选取
secondary air fan [化] 二次风机
If the air fan rotates stably and if anything is abnormal. 所有风机转动是否平稳，有无异常。
Presents the air conditioning system and smoke exhaust system design of this project, applies the primary air fan coil system and secondary pump water system in the Top Electronics City. 摘要简要介绍了鼎好电子商城空调系统和防排烟系统的设计，商城采用了风机盘管加新风空调系统和二次泵空调水系统。
The GGH seal air fan ensures zero leakage of the raw gas to the environment. 热交换器的密封风机以确保没有原烟气泄漏到环境中。
The secondary air system on the cylinder reduce the emission of the exhaustgas. 汽缸体上设置二次补气系统，有效降低排放。
Secondary air tuyere: aluminum alloy shutter,the surface was electro-sprayed by epoxy resin. 补风口：采用铝合金百叶窗，表面环氧树脂喷涂。
The smoke control mode of the tunnels is use of the TVF (Tunnel Ventilation Fan) and JAF (Jet Air Fan) of the station. 隧道区中之烟控模式，以车站的隧道通风机(TVF)送风排气，再加上喷流式风机(JAF)辅助之控制设计。
A secondary air pollutant is a harmful chemical formed in the atmosphere through a chemical reaction among air components. 另一类污染物则是通过大气组分间所发生的化学反应而形成的有害化学物质。
Another problem can occur rarely if backflow of process gas is permitted into the secondary air feed line. 如果工艺气体回流入二段空气管线，能发生另外的很少发生的问题。
Around While tubular air fan continuously into the evaporator finned heat, and between the cold air after combustion to send. 同时贯流风扇使空气不断进入蒸发器的肋片间进行热交换，并将放热后变冷的空气送向室内。
The simulation results show the obvious effect of "stratified and staggered impinging stream type multiple-nozzle secondary air" on eliminating soot. 在理论上证明了煤无烟燃烧锅炉“多孔分层错列撞击流”式二次风在消除碳黑方面具有明显的效果。
The dynamic response to the step change of inverter-aided compressor speed, opening of the EEV and air fan speed is studied. 通过仿真计算对一拖二系统随变频压缩机转速、电子膨胀阀开度以及回风风机转速改变的动态特性进行研究分析；为系统的实时控制打下基础。
The circulation volume of secondary air is one of the main factors that have an impact on the effectiveness of REC. 切换式电源供应器为现在最广泛的供电系统，它的优点具有效率高，体积小等。
Furthermore,the influence of central bluff body and velocity of swirling secondary air on backflow field are analyzed. 此外,分析了中心钝体形状及旋流二次风速对回流区大小的影响。
Ai J W.Application of hight-voltage inverter technologe in converter dust removed air fan of speel-making factor [ J ].The Wrold of Inverters,2003,7(1):43-45. [7]艾建伟.;高压变频技术在炼钢厂转炉除尘风机上的应用[J]
Test Data show that the pulsating amplitude of secondary air can reach 40% under some special conditions, affecting more greatly the flame stability. 另外，同样结构的风门安装在不同的风道中，将具有不同的流量调节特征。
The nozzle flow is composed of the main gas stream and the secondary air stream in order to simulate the nozzle of turbofan engine. 喷管中的气流由主流燃气和次流空气组成，用以模拟涡扇发动机的喷管。
Secondary Air Supply Synthesizer Secondary Air Supply Synthesizer can lown down emission of vehicles together with catalyst.Sometimes it can work separately. 二合一进气系统可与催化剂同时作用降低车辆排放污染物达到相关环保标准,在某些车辆上也可单独使用。
Increasing original resistan coefficient of the secondary air duct can improve the adjusting performance of air damper, and inhibit pulsation of the flow rate. 增加二次风道的原始阻力系数，可以使风门的调节特性得到改善并抑制流量脉动。