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Priority to JP11660479UpriorityCriticalpatent/JPS5810022Y2/ja
Priority to US06/177,376prioritypatent/US4344561A/en
Publication of JPS5644234UpublicationCriticalpatent/JPS5644234U/ja
Application grantedgrantedCritical
Publication of JPS5810022Y2publicationCriticalpatent/JPS5810022Y2/ja