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Priority to JP1977068393UpriorityCriticalpatent/JPS5813486Y2/ja
Priority to US05/908,000prioritypatent/US4159495A/en
Publication of JPS53163108UpublicationCriticalpatent/JPS53163108U/ja
Application grantedgrantedCritical
Publication of JPS5813486Y2publicationCriticalpatent/JPS5813486Y2/ja