| 摘要 |
A device (1) is disclosed for use in rebreathing. The device (1) comprises an enclosed bag (2) which is impermeable to moisture. The bag (2) is filled with a mouthpiece (9) adapted to be held between a user's lips and the mouthpiece (9) is in fluid communication with the interior of the bag (2). A filter (6) is interposed between the mouthpiece (9) and the bag (2) and there is provided a fresh air inlet (7) between the mouthpiece (9) and the filter (6). |
