| 摘要 |
A backrest device having a supporting surface presenting two elongate continuous or discontinuous protuberances (9) which extend alongside one another and are arranged to engage the back of a person, resting in use against the supporting surface, on each side of the spine, with a channel (10) between the protuberances (9) to accommodate the bony part of the spine with substantially no pressure on the bony part of the spine.
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