quantity of fresh air

Then the paper deduces a direct calculation of the new wind ratio , which leaves out the complex process that the quantity of fresh air is calculated first and checked then .

分别给出了混合通风和置换通风新风量的确定方法，并对其进行校核，进而推导出一个直接计算新风比的公式，省去了先计算新风量再校核的复杂过程。

By examining the indoor concentration distribution of pollutants , we can see that the concentration satisfies the scheduled standard , that is , the quantity of fresh air meets the requirement .

通过考察室内的污染物浓度分布，可以看出其浓度满足预定的标准，也就是说所计算的新风量符合要求。

The structure of intake port directly affects the quantity of fresh air and the strength of swirl in cylinder and it can be related with forming mixture air and oil , combustion , exhaust and total performance of diesel engine .

进气道结构直接影响内燃机缸内充量的大小和涡流的强弱，直接关系到混合气形成、燃烧、排放以及整机性能。

Periodically remove the indoor dust and bacteria , and clean up with damp cloth or wet mop , disinfect the air filter processing , reasonable regulation of the air quantity , replacement of fresh air .

定期清除室内的粉尘及微生物，清理卫生时最好用湿布或湿拖把，对空气过滤器进行消毒处理，合理调节风量，更换新鲜空气。