| 摘要 |
Device for discharging breathed-out gas towards a space having a lower pressure. The breathing-out moves a diaphragm which then opens a pilot valve. This opening of the pilot plane creates inside a casing the wall of which comprises another diaphragm an underpressure which lifts said another diaphragm and connects the space where is breathed-out the gas to the space with a lower pressure.
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