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Priority to JP7792768ApriorityCriticalpatent/JPS503531B1/ja
Priority to US808093Aprioritypatent/US3608981A/en
Priority to DE19691914276prioritypatent/DE1914276A1/de
Priority to FR6908457Aprioritypatent/FR2004558A1/fr
Publication of JPS503531B1publicationCriticalpatent/JPS503531B1/ja