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Priority to JP4160172ApriorityCriticalpatent/JPS5231173B2/ja
Publication of JPS494540ApublicationCriticalpatent/JPS494540A/ja
Publication of JPS5231173B2publicationCriticalpatent/JPS5231173B2/ja
Optical apparatus for selectively producing rippled message images in areas of specular surfaced photoplastic film and erasing such images from such areas for reuse