发明公开
EP1457973A3 Optical disk medium and optical disk recording/reproducing apparatus 有权
光盘和光记录/再现装置,

Optical disk medium and optical disk recording/reproducing apparatus
摘要:
In an optical disk medium, land recording tracks (1) are coupled by first and second coupling portions (3 and 4) at a particular radial position to form a tilt detecting mark SM.
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