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Priority to JP1974031757UpriorityCriticalpatent/JPS50122242U/ja
Priority to GB40883/74Aprioritypatent/GB1479779A/en
Priority to DE19742445434prioritypatent/DE2445434A1/de
Priority to US05/508,846prioritypatent/US4083177A/en
Publication of JPS50122242UpublicationCriticalpatent/JPS50122242U/ja