| 摘要 |
The device comprises a ring (10) connected by two flexible resilient strands (200,300) to base (30). The straps are connected at the base by straps (400) and have straight sides (210,310) for horizontal mounting and base points (230,240,330,340) for vertical mounting. The support strands may be formed by a variety of methods including molding, extrusion and bending
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