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Priority to JP5390573UpriorityCriticalpatent/JPS5138654Y2/ja
Priority to US05/459,725prioritypatent/US4004385A/en
Publication of JPS504510UpublicationCriticalpatent/JPS504510U/ja
Application grantedgrantedCritical
Publication of JPS5138654Y2publicationCriticalpatent/JPS5138654Y2/ja