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Priority to JP1974112253UpriorityCriticalpatent/JPS534777Y2/ja
Priority to GB37008/75Aprioritypatent/GB1499575A/en
Priority to US05/612,538prioritypatent/US4023162A/en
Publication of JPS5139480UpublicationCriticalpatent/JPS5139480U/ja
Application grantedgrantedCritical
Publication of JPS534777Y2publicationCriticalpatent/JPS534777Y2/ja