ventilation column

例句：

1. 1.The ventilation column is essential for maintaining a healthy indoor environment.
   通风柱对于保持室内空气健康至关重要。
2. 2. The ventilation column was designed to improve air circulation in the room.
   通风柱的设计目的是为了改善房间内的气流。
3. 3.The ventilation column has been installed at the top of the building, allowing fresh air to circulate throughout the space.
   在建筑顶部安装了通风柱，使新鲜空气在整个空间中循环。