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Priority to JP1977023869UpriorityCriticalpatent/JPS5919680Y2/ja
Priority to US05/882,122prioritypatent/US4223624A/en
Publication of JPS53120089UpublicationCriticalpatent/JPS53120089U/ja
Application grantedgrantedCritical
Publication of JPS5919680Y2publicationCriticalpatent/JPS5919680Y2/ja