| 摘要 |
Device formed by two double branches of pipe, which are parallel, in which one of each branch conveys water under pressure and the other air, there being intermediate clamps, also made from double pipe, which stiffen the structural frame and form communication between the two branches. At their ends and at intermediate points, these have take-offs perpendicular to each pipe which end in facing bends (elbows), the ends of each pair of air/water take-offs being connected by means of an ejection nozzle with a single, directable outlet. At a suitable depth, it is possible to provide a rocking platform which can optionally be used as a seat.
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