| http://www.w3.org/ns/prov#value | - The recording/reproducing device 10 includes an interface unit 12 for performing communication, such as exchange of data and order, with the host 20, a pickup unit 11 for writing/reading a data to/from the optical disc directly, a data processor 13 for receiving signal from the pickup unit 11, and recovering a desired signal value, or modulating a signal to be written into a signal able to be writ
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