| 摘要 |
The diving mask incorporates a clamp operated from the outside for squeezing the diver's nostrils together so that he can then "clear his ears," which is the act of allowing, or gently forcing, air through the restriction of the eustachian tubes to equalize the inner ear pressure to that of the increasing ambient pressure. The elements of the clamp are movable in arcuate paths centered above the nostrils in order to achieve a comfortable closure. The handle ends of the clamp are conveniently accommodated in a flexible enlargement of the mask body. A wide strap has a four point quick attachment to the rear of the mask body. The strap is formed of adjustable looped elastic cord that adjusts comfortably to the diver's conformation while fully stabilizing the mask on the wearer's face.
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