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Priority to JP1977169248UpriorityCriticalpatent/JPS5637742Y2/ja
Priority to US05/957,843prioritypatent/US4220329A/en
Priority to US05/957,842prioritypatent/US4200282A/en
Publication of JPS5494460UpublicationCriticalpatent/JPS5494460U/ja
Application grantedgrantedCritical
Publication of JPS5637742Y2publicationCriticalpatent/JPS5637742Y2/ja