| 摘要 |
A nine-ring physical fitness device comprises a long-ring part and a circular-ring part. The long-ring part comprises a long ring, a fixed power-assisting ring, a guide wheel bracket, and a supporting seat. The circular-ring part comprises circular rings, a penetrating rod, a bracket, and a base. The circular rings are linked by using a ring rod, and are all linked on the long ring. |
