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Priority to JP10706968UpriorityCriticalpatent/JPS4920432Y1/ja
Priority to GB1231956Dprioritypatent/GB1231956A/en
Priority to US834045Aprioritypatent/US3614247A/en
Priority to FR6935934Aprioritypatent/FR2027587A1/fr
Priority to DE19691961975prioritypatent/DE1961975A1/de
Publication of JPS4920432Y1publicationCriticalpatent/JPS4920432Y1/ja