摘要 |
<p>The moulded paving stone for a composite tread surface for roadways, squares, pavements etc. has four sides which are undulating or saw-toothed in shape. The stone is in the shape of a cross. The opposite end surfaces of the branches of the cross (1, 2) are moulded so that they are parallel to each other, and each incorporates at least two complete sinusoidal undulations. The branches of the cross are all of the same length, or can be of different lengths. The opposite side surfaces of the branches are parallel and also incorporate one complete undulation.</p> |