回风口 meaning in Chinese

air outlet
return air inlet

Influence of knowledge management on the process of technology innovation
回风口过滤器在空调洁净工程中的使用
The following sketch map shows the three standard installation modes , where air is from the back - wind port of the indoor unit
下面的示意图显示了三种标准的安装模式，而空气都是从该室内机的回风口进入。
Then , some proposals and methods are brought forward on the analysis of the causes of these kinds of noise . seeing that the noise radiates through the inlet of air and iron box , a silencer for the inlet and a rectangular enclosure are designed
针对加热器回风口和方箱是噪声向外辐射的必经途径，本文主要从消声器消声设计、方箱隔声设计两个方面出发，探讨了不改变加热器结构的降低噪声方法。
The results of the experiments indicate : the measures are very effective to have the noise pressure level of band reduced , especially in the 1000hz where it is decreased by 4 . 1db , and the same is to reduce the noise level from the inlet of air
经试验验证，所采用的降噪措施使加热器各频带的声压级都有了一定程度的降低，尤其是在人耳最敏感的1000hz处下降了4 . 1db ，并使回风口的噪声有了明显减小。