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Priority to JP1968042867UpriorityCriticalpatent/JPS4622330Y1/ja
Priority to GB1229228Dprioritypatent/GB1229228A/en
Priority to DE19681812528prioritypatent/DE1812528A1/de
Priority to FR1594900Dprioritypatent/FR1594900A/fr
Publication of JPS4622330Y1publicationCriticalpatent/JPS4622330Y1/ja