| 摘要 |
A device for difficult intervention in a closed enclosure, comprising an enclosure connected to the closed enclosure via a duct, a piston that can move thanks to a motor, a geometry allowing a contact with the outside air when the piston occupies a certain position within the enclosure in order to generate a sudden release of pressure, and an outlet valve remaining closed when the piston increases the volume of the enclosure so as to cause the pressure reduction within the enclosures.
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