| 摘要 |
<p>The cover is formed by superposed plates (2,3) which are spaced from one another by spacers (4). The one plate can be made from transparent material such as glass or plastics. The plate can be backed by a mirror surface and can be inscribed or decorated. Bores in the one plate can match the spacers in the other plate. The backing plate can be made from dark natural or synthetic stone.</p> |
