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Priority to JP75379UpriorityCriticalpatent/JPS636744Y2/ja
Priority to US06/091,926prioritypatent/US4281922A/en
Publication of JPS5599538UpublicationCriticalpatent/JPS5599538U/ja
Application grantedgrantedCritical
Publication of JPS636744Y2publicationCriticalpatent/JPS636744Y2/ja