| 摘要 |
An underwater breathing apparatus has a flotation device; and an air conduit comprising at least one air inlet and at least one air outlet in fluid communication with each other; at least two one-directional air valves oriented in the same direction and disposed between the at least one air inlet and the at least one air outlet, and a mouthpiece disposed between the air valves, wherein the at least one air inlet is mounted to the flotation device. During operation, the at least one or more air inlets are maintained above water by the flotation device while a submerged user breathes through the mouthpiece. |
