| 摘要 |
<p>The assistance has a ring-shaped unit connected to a ring and extended when attaching a ring to an upper arm (1). An inflatable chamber (2) is fastened to the ring-shaped unit. The inflatable chamber and/or the ring-shaped unit have a material with density smaller than that of water. The inflatable chamber has a relief valve for filling and deflating the chamber with gas. An independent claim is also included for a method for manufacturing buoyancy assistance.</p> |
