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Priority to JP2880780UpriorityCriticalpatent/JPS6271Y2/ja
Priority to DE19813108585prioritypatent/DE3108585A1/de
Priority to US06/241,240prioritypatent/US4403749A/en
Publication of JPS56131585UpublicationCriticalpatent/JPS56131585U/ja
Application grantedgrantedCritical
Publication of JPS6271Y2publicationCriticalpatent/JPS6271Y2/ja