摘要 |
<p>The part (14') of the said panel bordering a first side (12) of the opening (11) is sufficiently elastic for this side (12) to be able, under the effect of a force (F) on the said part, to be bent with its concavity turned towards the opening. This side (12) is bordered by a ridge (22), or a groove, set back relative to the front face (21) and which is intended, in order to fix the plate when the force has been relaxed, to engage with one face of a rib projecting from a first side of the plate. <IMAGE></p> |