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Priority to JP1979084331UpriorityCriticalpatent/JPS6236145Y2/ja
Priority to US06/160,844prioritypatent/US4348666A/en
Publication of JPS563458UpublicationCriticalpatent/JPS563458U/ja
Application grantedgrantedCritical
Publication of JPS6236145Y2publicationCriticalpatent/JPS6236145Y2/ja