| 摘要 |
<p>The wedge has small and large bases (7, 10) and lateral sides (2-5), where the wedge is formed of ceramic by streolithography and assumes a shape of a trunk of a pyramid with a rectangular base. The base (7) and the sides are pierced with fine channels (8), of which the channels of the side (2) extend in a direction of the side (4). The channels of the side (3) extend in a direction of the side (5), and the channels of the base (7) extend in a direction of the base (10). An opaque part (9) is arranged adjacent to the base (10).</p> |
