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Priority to JP8258176UpriorityCriticalpatent/JPS53738U/ja
Priority to DE2713116Aprioritypatent/DE2713116C3/de
Priority to GB12678/77Aprioritypatent/GB1581735A/en
Priority to FR7708985Aprioritypatent/FR2345856A1/fr
Publication of JPS53738UpublicationCriticalpatent/JPS53738U/ja
Priority to US06/000,794prioritypatent/US4246499A/en