| http://www.w3.org/ns/prov#value | - oneof the disc holder and the first side of the casing body being structured such that the disc holder is prevented from being incorrectly inserted into the casing body, the disc holder including an elastic member for supporting the disc therein; a pickupunit to record or read data on/from the optical disc; a servo unit to control the pickup unit; a data processor to process data output from the
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