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Priority to JP1967065740UpriorityCriticalpatent/JPS472930Y1/ja
Priority to US746867Aprioritypatent/US3513972A/en
Priority to GB1229315Dprioritypatent/GB1229315A/en
Priority to DE19681774625prioritypatent/DE1774625A1/de
Priority to FR1573790Dprioritypatent/FR1573790A/fr
Publication of JPS472930Y1publicationCriticalpatent/JPS472930Y1/ja