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Priority to JP1973140782UpriorityCriticalpatent/JPS554880Y2/ja
Priority to US05/515,541prioritypatent/US3960044A/en
Publication of JPS5086527UpublicationCriticalpatent/JPS5086527U/ja
Application grantedgrantedCritical
Publication of JPS554880Y2publicationCriticalpatent/JPS554880Y2/ja