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Continuous positive airway pressure mask fits around mouth and nose and has seal which fits against face, part of which has positive spring characteristics while other has negative characteristics
Continuous positive airway pressure mask fits around mouth and nose and has seal which fits against face, part of which has positive spring characteristics while other has negative characteristics
Continuous positive airway pressure mask (3) fits around the mouth and nose. It has a seal (1) which fits against the face, part of which has positive spring characteristics while the other has negative characteristics.
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