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Priority to JP1976016574UpriorityCriticalpatent/JPS5912812Y2/ja
Priority to US05/768,525prioritypatent/US4112324A/en
Publication of JPS52109461UpublicationCriticalpatent/JPS52109461U/ja
Application grantedgrantedCritical
Publication of JPS5912812Y2publicationCriticalpatent/JPS5912812Y2/ja