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Priority to JP2063269UpriorityCriticalpatent/JPS4737643Y1/ja
Priority to US16010Aprioritypatent/US3698304A/en
Priority to DE7008060Uprioritypatent/DE7008060U/de
Priority to DE2010370Aprioritypatent/DE2010370B2/de
Publication of JPS4737643Y1publicationCriticalpatent/JPS4737643Y1/ja