| 摘要 |
<p>In order to facilitate the folding back of the assembly along the longitudinal edges of the central part or back (5), the cardboard sheet (2) is made to include crease lines (6) which are disposed around the hollow-relief parts of the trays (3, 4) formed on the sheet of synthetic material (1), in this way allowing the expansion of this sheet (2) during closure of the box. <IMAGE></p> |
