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Priority to JP44033961ApriorityCriticalpatent/JPS499769B1/ja
Priority to GB2082770Aprioritypatent/GB1314442A/en
Priority to DE2021292Aprioritypatent/DE2021292C3/de
Publication of JPS499769B1publicationCriticalpatent/JPS499769B1/ja
Priority to US05/518,984prioritypatent/US3964075A/en
