| 摘要 |
<p>An indoor horse riding hall or horse riding track is formed by a sequence of layers with different properties placed on a firm substrate. The top layer is a water-permeable hoof-resistant material which is a mixture of crushed brick particles and/or crushed material with clay-like properties, plus a further material with non-clay like properties but of the same grain size. The top layer rests on a base layer made of the same materials but of larger grain size.</p> |
