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Priority to JP1976082496UpriorityCriticalpatent/JPS556570Y2/ja
Priority to US05/796,465prioritypatent/US4150667A/en
Priority to DE19772722707prioritypatent/DE2722707A1/de
Publication of JPS53690UpublicationCriticalpatent/JPS53690U/ja
Application grantedgrantedCritical
Publication of JPS556570Y2publicationCriticalpatent/JPS556570Y2/ja