| 摘要 |
PURPOSE: A chair capable of standing up and sitting down is provided to improve the concentration of study or learning as the posture of standing and sitting are able to one chair to freely letting the pose change. CONSTITUTION: A chair seat comprises an extension unit on both sides of the seat adhered to the bottom end portion of the chair seat; an extension unit of top side of the seat adhered to the bottom end portion of the chair seat; a back of a chair (1) perpendicularly connected to the chair seat; and a chair supporting unit of the bottom end portion of the chair seat.
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