Mouse operation, seen smoking on the mice which point, if the air pollution index too high, it is necessary to open ventilation windows.
鼠标操作，看到老鼠吸烟就点它，如果空气污染指数过高，要点击窗户打开通风。
2
The reliability of a mine ventilation system is for the safe production an important safety index of a mine.
矿井通风系统的可靠性是矿井安全生产的一项重要安全指标。
3
When determining air demand for tunnel ventilation, the air demand is taken from the bigger one between calculation of CO concentration index and smog concentration index.