In this process, if may pass through drum room mutual lack of understanding ventilation, although the canyon department block system will not have on the drum room negative pressure.

在这一过程中如果可以经鼓室隔膜通气的话，尽管峡部闭锁也不会产生上鼓室的负压。

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Tunnel ventilation process is approximately a system of time lag of first order, real time control of wind pressure in tunnel pipe is adopted self-tuning fuzzy PID.

隧道通风过程可近似认为是一个一阶时滞系统，系统采用自整定模糊pid对隧道管网的风压进行实时控制。

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Starter is installed in the cooling ventilation system of a general nacelle, the starter environmental temperature and pressure has important influence on the working reliability of starter.

起动机安装在某通用发动机试验吊舱的冷却通风系统中，起动机环境的温度、压力对起动机的工作可靠性有着重要的影响。

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