| 摘要 |
<p>An extruded panel unit (2) for constructional purposes, having two sheet-like major surfaces (4, 6) interconnected and spaced apart by a plurality of ribs (8) and intermediate surfaces (10) dividing the space delimited by the major surfaces (4, 6) into a plurality of sub-spaces (12). In cross-section, the sheet-like major surfaces (4, 6) and the ribs (8) and intermediate surfaces (10) form a truss-like structure and there are provided more than three sub-spaces (12) across a plane extending substantially normal to and connecting the major surfaces (4, 6). <IMAGE></p> |
