| 摘要 |
<p>The present invention relates to a structural element comprising of a rigid, hollow body having upper and lower, essentially parallel sides and interjacent side sections and configured in such a way that it can be positioned above a similarly configured structural element, and that it is locked to prevent movement orthogonally in relation to a subjacent, similarly configured structural element by such positioning, and that the structural element comprises one filling orifice (3) on the upper side of the structural element and one drain orifice (4) on the lower edge of one of the side sections of the structural element.</p> |
