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Priority to JP11998970ApriorityCriticalpatent/JPS4840756B1/ja
Priority to DE2164018Aprioritypatent/DE2164018C3/de
Priority to DK632671Aprioritypatent/DK131875C/da
Priority to US00211711Aprioritypatent/US3767533A/en
Publication of JPS4840756B1publicationCriticalpatent/JPS4840756B1/ja