| 摘要 |
PROBLEM TO BE SOLVED: To improve appearance performance, to facilitate manufacture assembly and to reduce a cost of a seat of which size is changeable and adjustable. SOLUTION: A seat side part 31 is moved to the seat center part 30 of a backrest seat and the size is changed. Then, the seat side part 31 is surrounded by a side facing member 35 independent of the seat center part 30, a partition member 39 is provided on a side face 37 to be the joining surface of the seat center part 30 and the seat side part 31 and the end parts of the side facing member 35 and the center facing member 34 of the seat center part 30 are respectively locked to the front end of the partition member 39.
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