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Priority to JP5151774ApriorityCriticalpatent/JPS523043B2/ja
Priority to DE19752511840prioritypatent/DE2511840B2/de
Priority to NL7503202Aprioritypatent/NL7503202A/xx
Publication of JPS50143901ApublicationCriticalpatent/JPS50143901A/ja
Publication of JPS523043B2publicationCriticalpatent/JPS523043B2/ja