| 摘要 |
<p>The swimming aid is for use by adults and children when learning the various stroke styles, and provides stability of the swimming position and support during movement. It comprises a body composed of three welded sheets of plastics or similar material, with two inflatable air chambers positioned horizontally and inflatable via safety valves. An adjustable retention belt is provided. The swimming aid has two air chambers, and its central position provides a twist-free location for the swimming, while the two chambers at the ends furnish adequate support and remain stable in the swimming position.</p> |
