| 摘要 |
<p>A The manhole cover is described with a supporting structure device comprising force distribution ribs for supporting a top surface of the manhole cover which can be driven over, and a hollow force distribution cylinder arranged substantially centrally, in particular a circular force distribution cylinder, for supporting the force distribution ribs, characterised by a force distribution plate to relieve the load on the force distribution cylinder, wherein the force distribution plate at least substantially completely covers an underside of the force distribution cylinder in relation to the top surface, and wherein the force distribution ribs transform smoothly into the force distribution plate.</p> |
