| 摘要 |
PROBLEM TO BE SOLVED: To let creases not generate when a fringe part of a base is turned back to the rear side together with a mounting sheet.SOLUTION: A mounting sheet 20 is stuck to a center part of a front face of a base 10, also a fringe part of the mounting sheet 20 is stuck to a fringe part of the front face of the base 10, a part between the center part and the fringe part of the front face of the base 10 is not stuck to the mounting sheet 20, the base 10 is bent in a part not stuck to the mounting sheet 20, and the fringe part of the base 10 and the fringe part of the mounting sheet 20 are turned back to the rear side of the center part. |
