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Priority to JP1967091270UpriorityCriticalpatent/JPS4634275Y1/ja
Priority to GB1237938Dprioritypatent/GB1237938A/en
Priority to DE19681801676prioritypatent/DE1801676C3/de
Priority to US768639Aprioritypatent/US3573880A/en
Priority to FR1589929Dprioritypatent/FR1589929A/fr
Publication of JPS4634275Y1publicationCriticalpatent/JPS4634275Y1/ja