| 摘要 |
<p>The edge paving stone is used for paving railway tracks, esp with paving stones made of concrete, usually involving a concrete filling to bridge the joint with side profile units where the wheel flange groove is provided. The top visible surface (3) has a stepped recess in its peripheral area, with size corresponding to a wheel flange groove (6). he rest of the top visible surface may be roughened by washing out. The edge produced between the top visible surface and the vertical face (7) may have a sloped surface (8). This layout makes it unnecessary to weld profiles to the track and to apply a concrete filling for connection with the laid paving stones.</p> |
