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- 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。
- The secondary air duct of boilers is a group of large diameter short ducts in parallel connection, having inlet air flow condition with inner positioned resistant pieces. 摘要锅炉二次风道为有内置阻力件的一组并联大口径短通道，其阻力系数严重偏小而且风门涡流强烈，从而造成二次风强烈脉动。
- secondary air duct 二次风道
- External air duct and exhaust pipe connector. 外置式出入油管连接座。
- No consideration of the grounding for air duct and air-condition. 风管及空调设备没有考虑接地。
- Lists some Japanese enterprises dealing with air duct cleaning. 列出了日本几家开展空调风管清扫业务的企业。
- Presents an introduction to Italian ALP air duct system. 提出了风管合流数和系统经济数的概念。
- 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。
- HVAC system ---Thermal insulation for the air duct and pipe system of HVAC. 空调系统---送风软管及管道法兰的保温各类罐体、设备的绝热保温及吸产降噪。
- Rectify the gap at final connections between air duct and grille / louvre. 修补通风喉管与通风格栅/百?风口接驳处的空隙。
- 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。
- One of the air ducts has become blocked. 有一条输气管堵塞了.
- 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。
- 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 sealing material for air duct going though walls not good, it will cause shrinkage. 某些风管穿墙处,密封材料不好,会变形萎缩。
- 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。
- Remove combustible insulation or rectify flame-retardant property at * air duct / pipework / air handling unit. 通風喉管／管道／風櫃的易燃隔熱層須予拆除或其防火特性須予矯正。
- 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。
- The bronchial lavage has achieved a good effect in diagnosing diseases of air duct in neonatus clinic. 在新生儿临床亦逐渐应用支气管灌洗于诊治气道疾病,并取得满意疗效。
