| 摘要 |
<p>A swim spa or swim-in-place swimming pool in which horizontal water jets are employed to maintain a sustained swimming current along the upper water levels, the speed of said swimming current being regulated by 5 controlling the output of pumps or by varying the configuration of nozzles emitting said jets; continuous or controlled, upwardly-directed jets of water or streams of air bubbles being emitted to create an upwelling of water in said swimming zone to enhance the apparent buoyancy of a swimmer; means being provided to detect the position of a swimmer 10 within said swimming zone and to control a system of visual or audible guidance signals provided to assist the swimmer to maintain position in said swimming zone, or to control said upwardly-directed jets of water or streams of air bubbles. Sheet 1 of 12 ( *</p> |
