| 摘要 |
A bent front wall 2 a of a roof panel 2 is not bent at least inwardly of a press-worked direction of the roof panel 2, so that a front end of the roof panel 2 is free from undercut formation. This eliminates the necessity to further machine the front wall 2 a of the press-worked roof panel 2, using for example a cam. Thus, manufacturing cost may be reduced without increasing man-hour.
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