PREVIEW
... alve closed!
The air exchange between room 909 and the outside world slowly came to a stop.
Housekeeper Yao wasn’t satisfied with just that and casually opened the negative pressure valve.
What is the negative pressure valve?
This device’s purpose is to extract the air from the room, creating a vacuum environment inside.
The original intention of this device was to reduce the suspects’ willpower and resistance under mildly hypoxic conditions, leading them ...
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