| 摘要 |
<p>A submersible floatation structure is formed of lengths of tubing which are interconnected by fittings. In one embodiment, the tubing end fittings are formed of a polymeric material, such as polyvinyl chloride. The tubing lengths and fittings are interconnected to form a selectable configuration, which, in some embodiments, may be in the form of a reclining chair, a raft, a buoy, or a life preserver ring. Valves are provided for allowing water to enter the structure and thereby provide a ballast which serves selectably to submerge the structure, or render the structure for use on land.</p> |
