Excessive air factor is an important parameter of operation status of burning process. Reasonable determination of excessive air factor has significant effect on increasing energy efficiency.

过量空气系数是燃烧过程运行情况的一个重要参数，合理确定过量空气系数对于提高能源利用率有很大意义。

youdao

Pressure, such as blood pressure, air pressure, is the usual sign to discover the status of patients. So these simple but important physics parameter will be discussed in this chapter.

类似于血压、呼吸压等压力物理量，虽然很简单，但是也可以揭示身体的状态，这是我们要讨论的。

youdao