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Priority to JP4423879UpriorityCriticalpatent/JPS623925Y2/ja
Priority to US06/135,149prioritypatent/US4342000A/en
Publication of JPS55144409UpublicationCriticalpatent/JPS55144409U/ja
Application grantedgrantedCritical
Publication of JPS623925Y2publicationCriticalpatent/JPS623925Y2/ja