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Priority to JP2403881UpriorityCriticalpatent/JPS6217142Y2/ja
Priority to US06/410,828prioritypatent/US4424742A/en
Priority to DE19823231313prioritypatent/DE3231313A1/de
Publication of JPS57141832UpublicationCriticalpatent/JPS57141832U/ja
Application grantedgrantedCritical
Publication of JPS6217142Y2publicationCriticalpatent/JPS6217142Y2/ja