以坐者为核心，模拟人体脊柱自然曲率，妥帖照顾使用者的腰颈习惯。
With users as thecore, imitate human spinal curvature; proper protect users' waist and neck.
升降腰托
Adjustable waist support
意大利DONATI自重式倾仰机构
Self-weight reclining (Dead load tilting ) mechanism , of Italian DONATI .
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