The paper introduced a new developed long distance control system for ventilation door in underground mine.

介绍一种新研制的煤矿井下自动风门远程控制系统。

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The novel ventilation door not only can be opened in emergency, but also is free from damaging the functions of the original ventilation door.

本实用新型不仅能在紧急情况下，快速打开，而且不会破坏原有风门的功能。

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Ventilation is facilitated by the entry blast door remaining ajar.

防爆门半开半掩能够促进通风。

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Willingham had fled out the front door, and the fire simply followed the ventilation path, toward the opening.

NEWYORKER: Trial by Fire