| 摘要 |
The internal wall (3) of the snorkel (4) forms two tubes, and a square section tip (1) has a valve for the discharging of air in the ferrule (2). A flexible joint (5) fixes the snorkel to the mask which has a transparent plastics visor (6).The part fixing the snorkel to the mask has an opening joint (7) allowing air expiration. A plastics projection (8) directs inspired air through 180 degrees in the mask near the visor preventing formation of deposits. A flexible silicon hollow joint (9) insulates the mask and allows expiration of air to the snorkel. Rubber fixing bands (10) cover the ears and a part of the skull. An internal flexible silicon partition separates the mask into an upper chamber for sight and a lower chamber for breathing (11). There are two valves (13) which open for air aspiration and close for expiration. A fine membrane (17) allows hearing in the water.
|
