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Priority to JP1976141775UpriorityCriticalpatent/JPS5611938Y2/ja
Priority to GB43525/77Aprioritypatent/GB1567593A/en
Publication of JPS5358947UpublicationCriticalpatent/JPS5358947U/ja
Priority to US06/045,775prioritypatent/US4220625A/en
Application grantedgrantedCritical
Publication of JPS5611938Y2publicationCriticalpatent/JPS5611938Y2/ja