| 摘要 |
<p>The invention concerns an inflatable grille, whereof the numerous openings are provided with open-worked netting, capable of being spaced apart and locked for rescuing in an aquatic environment someone stuck beneath the device to move onto the device and to clean the floor of a swimming pool more easily by inserting the vacuum cleaner in the netting openings which are capable of being spaced apart and locked. Said grille is associated with hoisting means adapted to the environment wherein it operates and in swimming pools with slide rails having a non-return system which blocks the device in high position.</p> |
