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Priority to JP1976102528UpriorityCriticalpatent/JPS5619211Y2/ja
Priority to US05/819,573prioritypatent/US4138151A/en
Publication of JPS5320918UpublicationCriticalpatent/JPS5320918U/ja
Application grantedgrantedCritical
Publication of JPS5619211Y2publicationCriticalpatent/JPS5619211Y2/ja