| 摘要 |
<p>The invention relates to an enclosure made up of a cover (1) and a base (2) having on at least at one of the sides of the opening thereof one or two cylindrical guides (4) in the longitudinal direction; and a rack (5) having, on at least at one of the two ends thereof, on either side, hook-shaped projections (6) and at least one or two central teeth (7) having the shape of a pawl (8) on the bottom, with the retaining edge facing upwards, having a space (10) between the teeth when the rack comprises two central teeth.</p> |
