1 . pvc leather black beige red green optional 2 . backrest : new style shuttle key for recline incline automatic control system 4 .新型专利按摩系统旋转揉捏捶打震动
5 . the armrest movable as the backrest adjustment , which provide whole body massage and unfettered massage 5扶手能够随靠背的下调而转动，能够进行深度人体按摩及消遥按摩。
Body hugging triple segmented backrest , combinde with height adjustable t - armrests and user adjustable tilting mechanism 贴心的三段分离式背靠t型可调节扶手，可调试倾仰机构。
The depth of the seat should be appropriate so that the patient can sit straight with hisher back supported by the backrest 腰背应保持挺直，椅子深度应能使背部轻松地贴靠椅背。
The depth of the seat should be appropriate so that the patient can sit straight with his her back supported by the backrest 腰背应保持挺直，椅子深度应能使背部轻松地贴靠椅背。
And the ga optimization algorithm in product ergonomics form design is also illustrated by the case of wheelchair backrest 最后以轮椅靠背的曲面设计和优化为例，阐明了遗传算法在产品人机形态方面的设计和优化方法。
