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Priority to JP2861969ApriorityCriticalpatent/JPS5231711B1/ja
Priority to NL7005296Aprioritypatent/NL7005296A/xx
Priority to GB07585/70Aprioritypatent/GB1292060A/en
Priority to DE19702018027prioritypatent/DE2018027A1/de
Publication of JPS5231711B1publicationCriticalpatent/JPS5231711B1/ja