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Priority to JP1980051384UpriorityCriticalpatent/JPS6312111Y2/ja
Priority to US06/253,461prioritypatent/US4408732A/en
Priority to DE3115075Aprioritypatent/DE3115075C2/de
Publication of JPS56153920UpublicationCriticalpatent/JPS56153920U/ja
Application grantedgrantedCritical
Publication of JPS6312111Y2publicationCriticalpatent/JPS6312111Y2/ja