| 摘要 |
<p>This element, which serves as casing, consists of a caisson (1) in the form of a right-angled parallelepiped, for being vertically erected and attached to adjacent elements by its narrow lateral vertical edges; this element is characterised in that its external surface (14), initially plane, has vertical recesses (4) the width of which can be increased or, on the contrary, decreased, such that it is possible to give to the element (1) a concave or a convex curvature.</p> |
