| 摘要 |
The mask has a window (1) which is inclined and a supple part (2) that is in contact with the face. The supple part has a reservoir (3), under the window, that holds a small quantity of water. The reservoir is under the nose of the user and the water is not in contact with the respiratory channels. The water allows mist to be cleared from the window, without affecting the emptying of the mask.
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