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Priority to JP7640666UpriorityCriticalpatent/JPS4416803Y1/ja
Priority to US611725Aprioritypatent/US3421315A/en
Priority to DE19671576748prioritypatent/DE1576748A1/de
Priority to FR93301Aprioritypatent/FR1509820A/fr
Publication of JPS4416803Y1publicationCriticalpatent/JPS4416803Y1/ja
