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Priority to JP8453976UpriorityCriticalpatent/JPS532833U/ja
Priority to US05/808,523prioritypatent/US4134617A/en
Priority to GB26690/77Aprioritypatent/GB1581842A/en
Priority to FR7719663Aprioritypatent/FR2355688A1/fr
Publication of JPS532833UpublicationCriticalpatent/JPS532833U/ja