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Priority to JP9763180UpriorityCriticalpatent/JPS6343512Y2/ja
Priority to US06/272,334prioritypatent/US4380947A/en
Publication of JPS5725396UpublicationCriticalpatent/JPS5725396U/ja
Application grantedgrantedCritical
Publication of JPS6343512Y2publicationCriticalpatent/JPS6343512Y2/ja