What is the role of the small hole in the airplane window?

The official name of the hole in the window of the aircraft is actually a “breathing hole.” It…

What is the role of the small hole in the airplane window?
What is the role of the small hole in the airplane window?

The official name of the hole in the window of the aircraft is actually a “breathing hole.” It can be used to adjust the pressure between the inner and outer window glass. In addition, this breathing hole can play the role of moisture and anti-fog, so the scenery you see from the cabin is always clear.

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