The diagonal branch of ventilation network has the characteristic of instable airflow.
通风网络中的角联分支本身具有风流不稳定的特点。
2
The paper presents the methods and researching condition of tunnel fire, the characteristic of emergency ventilation, and the system of rescuing and putting out fire in tunnels.
论文介绍了隧道火灾的研究方法及现状，火灾事故应急通风的特点，以及隧道火灾通风灭火救援体系。
3
This paper presents the calculation of the heat gain and air volume in a motor - test lab. and introduces the constitution and characteristic of the air conditioning and ventilation system.