| 摘要 |
<p>The device has a set of intermediate grid plate elements (12) comprising a grate strutting and a first set of supports (20) distributed over one of the elements. The supports extend between a bottom face (24) and a top face (22) of the elements in a direction transverse to the extension of the elements. The supports bear on a second set of supports of another set of intermediate grid plate elements arranged below the former set of plate elements, and bear a third set of supports arranged above the former set of plate elements, where the supports are in strand shape.</p> |
