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座椅的前伸后退是为了利于在平躺时节约空间和躺下时的受力平衡不至于倾覆另外还可以离需要拿的物体更近一些,座椅的上升与下降主要是为了在被别人照顾需要移动时上升一定高度以便于照顾的人不需要弯腰省力;将座椅的上升和前移组合起来还可以拿一些较高点的物体:座椅可以进行简单的翻转可以是腿部残疾的人在不需要别人的帮助下进行康复训练
Seat forward and backward in order to facilitate saving space when lying down and lie down balance of force will not overturn Also can take objects closer to the need to take some of the rise and fall of the seat is mainly to be others Caring for those who need to move up a certain height for ease of care without having to bend over; combining the up and up of the seat can also take some of the taller things: the seat can be simply flipped over can be leg disability Of people do rehabilitation without the help of others