| 摘要 |
<p>Of the type whose structure is based on a panel (1) composed of a series of dovetailed tongue-and-grooved planks, whose edges intended to move on the press guides are reinforced by means of metal, channelled sections (4), focuses its characteristics on the said sections being overdimensioned in length, in such a way that at each of their ends their middle branch (9) is bent orthogonally towards the concave area of the section, by means of a bend (5), at the same time that their lateral branches do so simultaneously and on the previous bend, forming in their turn coplanar bends (6-6') that make contact with one another via their free edge (7) and which form for each end of the metal section perfectly flat faces, rounded vertices and edges (8) and a multilayer structure that considerably increases their mechanical strength. <IMAGE></p> |
