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Priority to JP1972075229UpriorityCriticalpatent/JPS5251786Y2/ja
Priority to US369832Aprioritypatent/US3889282A/en
Publication of JPS4933847UpublicationCriticalpatent/JPS4933847U/ja
Application grantedgrantedCritical
Publication of JPS5251786Y2publicationCriticalpatent/JPS5251786Y2/ja