| 摘要 |
A flexible ring is disclosed comprising one or more coiled springs and/or polymeric ring(s). In some embodiments, the coiled spring envelopes one or more inner coiled springs. In other embodiments, one or more handles circumscribe a portion of the outer coiled spring. Various embodiments of the present invention substitute flexible polymeric members for the coiled spring. In other embodiments, a disc is substituted for the polymeric ring(s). |
