| 摘要 |
Record tracks 3, which are separated from each other by lands 5, each comprise information areas 2 spaced from each other by intermediate areas 4. The areas 2 and 4 are formed as pits or hills in a surface and the information areas have a first, comparatively large, phase depth, as defined, and the intermediate areas a second, comparatively small, phase depth. �<IMAGE>� |
