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Priority to JP5087572UpriorityCriticalpatent/JPS5320970Y2/ja
Priority to US333172Aprioritypatent/US3866827A/en
Priority to GB810673Aprioritypatent/GB1387108A/en
Publication of JPS4910431UpublicationCriticalpatent/JPS4910431U/ja
Application grantedgrantedCritical
Publication of JPS5320970Y2publicationCriticalpatent/JPS5320970Y2/ja