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Priority to JP1968047130UpriorityCriticalpatent/JPS4531460Y1/ja
Priority to US825642Aprioritypatent/US3603438A/en
Priority to DE19691926431prioritypatent/DE1926431A1/de
Priority to FR6918405Aprioritypatent/FR2010191A1/fr
Publication of JPS4531460Y1publicationCriticalpatent/JPS4531460Y1/ja