Also known as: 通風孔
An opening that allows air, gases, or liquid into or out of a confined space. Commonly covered with a Grate. Not to be confused with Ventilation Shaft which are the shafts or tubes behind a vent.
Also known as: 通風孔
An opening that allows air, gases, or liquid into or out of a confined space. Commonly covered with a Grate. Not to be confused with Ventilation Shaft which are the shafts or tubes behind a vent.
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