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Priority to JP915372UpriorityCriticalpatent/JPS5234536Y2/ja
Priority to US00240877Aprioritypatent/US3774739A/en
Priority to DE19722216840prioritypatent/DE2216840C3/de
Publication of JPS4885048UpublicationCriticalpatent/JPS4885048U/ja
Application grantedgrantedCritical
Publication of JPS5234536Y2publicationCriticalpatent/JPS5234536Y2/ja