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Priority to JP9140168ApriorityCriticalpatent/JPS5312505B1/ja
Priority to GB1252619Dprioritypatent/GB1252619A/en
Priority to DE19691961919prioritypatent/DE1961919C/de
Priority to FR6943035Aprioritypatent/FR2026002A1/fr
Priority to NL6918716Aprioritypatent/NL6918716A/xx
Publication of JPS5312505B1publicationCriticalpatent/JPS5312505B1/ja