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Priority to JP1979104570UpriorityCriticalpatent/JPS5839782Y2/ja
Priority to DE3027276Aprioritypatent/DE3027276C2/de
Priority to US06/171,822prioritypatent/US4373679A/en
Publication of JPS5620654UpublicationCriticalpatent/JPS5620654U/ja
Application grantedgrantedCritical
Publication of JPS5839782Y2publicationCriticalpatent/JPS5839782Y2/ja