| 摘要 |
Floating rings (1) with wires (3) fastened to a bottom ring (4), and a trampoline base (5) with tension mechanism (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 22). A lift ring (12) which may be connected to compressed air supply, and a ballast block (21). |
