| 摘要 |
<p>The circle comprises a number of interconnected crosses, permitting division of the circle into a random number of similar parts. The crosses are of like dimensions and the cross beam of each can be pushed over the corresponding upright. On the basis of the fixture of each cross in the central point of the circle with the cross beams coupled to each other a complete entity is formed. By drawing a line on the same edge of the uprights to the central point, the circle is divided into the number of desired parts.</p> |
