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Priority to JP1976082093UpriorityCriticalpatent/JPS532329U/ja
Priority to US05/807,343prioritypatent/US4132157A/en
Priority to DE19777719731Uprioritypatent/DE7719731U1/de
Priority to DE19772728336prioritypatent/DE2728336A1/de
Publication of JPS532329UpublicationCriticalpatent/JPS532329U/ja