| 摘要 |
<p>A breathing device comprising a bag of flexible material (1) and a flexible hose (4) in fluid communication with the interior of the bag. The flexible hose is provided with a mouthpiece (6) so as to allow a wearer of the device to exhale into the bag and to inhale from the bag via said mouthpiece and said flexible hose. The hose is in fluid communication with the interior of the bag at a plurality of locations (10, 11, 13) mutually spaced across the bag to ensure proper communication between the hose and the interior of the bag even when the bag becomes partially flattened due to external pressure.</p> |
