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Priority to JP1977069755UpriorityCriticalpatent/JPS5714161Y2/ja
Priority to US05/880,161prioritypatent/US4168598A/en
Priority to CA297,931Aprioritypatent/CA1079175A/en
Priority to DE2808836Aprioritypatent/DE2808836C2/de
Publication of JPS53164574UpublicationCriticalpatent/JPS53164574U/ja
Application grantedgrantedCritical
Publication of JPS5714161Y2publicationCriticalpatent/JPS5714161Y2/ja