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Priority to JP12261980UpriorityCriticalpatent/JPS6211179Y2/ja
Priority to US06/220,724prioritypatent/US4398109A/en
Publication of JPS5761959UpublicationCriticalpatent/JPS5761959U/ja
Application grantedgrantedCritical
Publication of JPS6211179Y2publicationCriticalpatent/JPS6211179Y2/ja