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Priority to JP2242481UpriorityCriticalpatent/JPS6119438Y2/ja
Priority to US06/347,671prioritypatent/US4427370A/en
Priority to DE19823206031prioritypatent/DE3206031A1/de
Publication of JPS57137998UpublicationCriticalpatent/JPS57137998U/ja
Application grantedgrantedCritical
Publication of JPS6119438Y2publicationCriticalpatent/JPS6119438Y2/ja