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Priority to JP298577UpriorityCriticalpatent/JPS5814395Y2/ja
Priority to US05/868,716prioritypatent/US4215618A/en
Publication of JPS5399135UpublicationCriticalpatent/JPS5399135U/ja
Application grantedgrantedCritical
Publication of JPS5814395Y2publicationCriticalpatent/JPS5814395Y2/ja