Should be closely after placing all the ventilation door.

放置后应紧密关闭一切的通风门。

youdao

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。

youdao

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。

youdao

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

NEWYORKER: Trial by Fire

They lined us up, no air, no ventilation, if we had to go to the bathroom we had to leave the door open so they can sit there and watch us and I was there for eight weeks straight. 10.10.51 Winston Wilkinson Pretty much when I ran away they sentenced me to go to OP.

BBC