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Priority to JP9735070ApriorityCriticalpatent/JPS5040666B1/ja
Priority to US00188228Aprioritypatent/US3790266A/en
Priority to DE19717139544Uprioritypatent/DE7139544U/de
Priority to DE19712152053prioritypatent/DE2152053C3/de
Publication of JPS5040666B1publicationCriticalpatent/JPS5040666B1/ja