| 摘要 |
The system consists of flexible three-dimensional elements, comprises several base elements assemble together to form a ring, to which several curved sections can be attached. A curved centering ring is provided, as well as connection clamps which connect the individual base elements to the centre of the curved sections and are used to form the ring shape. Holder elements are provided and may be straight, curved or flexible, whereby the holder elements are guided via the centering spring.
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