| 摘要 |
PROBLEM TO BE SOLVED: To suppress pressure which a user feels as a result that an upper door is opened linked with opening of a lower door. SOLUTION: The length in a vertical direction of the upper door 51 is not longer than 2/3 of the length in a vertical direction of the lower door 52 (a ratio of the length in a vertical direction of the upper door 51 to the length in a vertical direction of the lower door 52 is about 3.5:6.5, for example). The upper end of the upper door 51 can be rotated forward/upward with a rotation axis extending to the right and left as a center, and the lower end of the lower door 52 can be rotated forward/downward with a rotation axis extending to the right and left as a center. COPYRIGHT: (C)2004,JPO
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