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Priority to JP10478180UpriorityCriticalpatent/JPS6332780Y2/ja
Priority to EP19810303303prioritypatent/EP0044733B1/en
Priority to DE8181303303Tprioritypatent/DE3168475D1/de
Publication of JPS5728068UpublicationCriticalpatent/JPS5728068U/ja
Application grantedgrantedCritical
Publication of JPS6332780Y2publicationCriticalpatent/JPS6332780Y2/ja