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Priority to JP49061346ApriorityCriticalpatent/JPS5950713B2/ja
Priority to US05/543,431prioritypatent/US4137192A/en
Priority to DE19752502904prioritypatent/DE2502904A1/de
Publication of JPS50152987ApublicationCriticalpatent/JPS50152987A/ja
Publication of JPS5950713B2publicationCriticalpatent/JPS5950713B2/ja