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Priority to JP50025426ApriorityCriticalpatent/JPS51100162A/ja
Priority to DE2557718Aprioritypatent/DE2557718C3/de
Priority to GB52638/75Aprioritypatent/GB1538441A/en
Publication of JPS51100162ApublicationCriticalpatent/JPS51100162A/ja
Publication of JPS5334157B2publicationCriticalpatent/JPS5334157B2/ja