| 摘要 |
<p>A double-sided disc for use in two different types of optical readers, the disc comprising a first side (1) which is readable by a first type of optical reader and a second side (2) which is readable by a second type of optical reader. The disc is preferably suitable for use in a CD player and a DVD player. A removable hub (8) may be positioned to provide either a CD mode or a DVD mode.</p> |
