| 摘要 |
A mouthpiece for use in underwater Scuba application, exhibiting a variable-position exhaust flow valve, controllable by the user. The user alters the size of the valve opening during exhale, in order to more easily maintain and control the air pressure within the respiratory system. This increased control reduces the need for compensation by the respiratory muscles (ie. diaphragm, intercostals), thus reducing diver fatigue and increasing diver endurance.
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