| 摘要 |
<p>Accessory for gas masks, characterised thereby that it mainly consists of means (1) being able to connect the inside (2) of the gas mask (3) with the outside environment, a sealing element (4) that can co-operate with said means (1), said sealing element in a first position providing the sealing of the connection and in a second position providing the free passage of it in order to allow the supply of food and/or the drainage or perspiration, and means (5) to maintain said sealing element (4) in its first position.</p> |
