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US6154439A Optical recording medium and manufacturing method thereof 失效
光记录介质及其制造方法

Optical recording medium and manufacturing method thereof
摘要:
An optical recording medium according to the present invention includes a data recording area forming a double spiral structured track having spiral recording tracks each formed of a groove and a land adjacent to the groove, and a reproduction only area forming a single spiral structured track consisting of a pit row.
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