| 摘要 |
A seat adjustable chair is provided to allow the length of the seat to be changed by controlling the back supporting part connected with the seat according the size of the human body. A seat adjustable chair is controlled by dividing the seat into two parts, connecting the two parts by using a connection part(2); controlling the length by using the connection part; and controlling the back supporting part connected with the seat front and back by using a connection part so as to change the length of the seat.
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