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Hitachi Ltd
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Hitachi Ltd
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Application filed by Hitachi LtdfiledCriticalHitachi Ltd
Priority to JP4354777ApriorityCriticalpatent/JPS53129473A/en
Publication of JPS53129473ApublicationCriticalpatent/JPS53129473A/en
PURPOSE: To control light distribution property light dispersion materials of different particle diameter and refractive index are painted sequentially.