Some of the basic features of mine ventilation network are analyzed.
本文对矿井通风的某些基本性质进行了分析和论证。
Actually, in the case of ventilation network disaster airflow always was unsteady flow.
实际上，在通风网络发生灾变的情况下经常会遇到非定常流动。
Actually, in the case of ventilation network disaster airflow always was unsteady flow.
实际上，在通风网络发生灾变的情况下经常会遇到非定常流动。
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