| http://www.w3.org/ns/prov#value | - Referring to FIG. 2, the optical disk 1 according to the present invention includes a substrate 29 made of transparent material such as for example polycarbonate or the like, reproducing film 30 in which signals are recorded by means of pre-pit and the recorded signals are reproduced by irradiating laser beam thereon, and protective film 21 for protecting the reproducing film 30, as its prominent
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