| 摘要 |
In a hybrid optical disk medium has data recording surfaces at both sides thereof, one of which is a first recording surface and the other is a second recording surface, a removable first label representing "HDDVD" and "NO DVD" to identify the disk format of the second recording surface is attached to a region outside a disk clamping region on the disk surface of the first recording surface, and a removable second label representing "DVD" and "NO HDDVD" to identify the disk format of the first recording surface is attached to a region outside the disk clamping region on the disk surface of the second recording surface.
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