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Priority to JP1978156538UpriorityCriticalpatent/JPS5720610Y2/ja
Priority to US06/091,496prioritypatent/US4314438A/en
Publication of JPS5575677UpublicationCriticalpatent/JPS5575677U/ja
Application grantedgrantedCritical
Publication of JPS5720610Y2publicationCriticalpatent/JPS5720610Y2/ja