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Priority to JP1980098745UpriorityCriticalpatent/JPS641162Y2/ja
Priority to IT8122826Aprioritypatent/IT1137692B/it
Publication of JPS5722461UpublicationCriticalpatent/JPS5722461U/ja
Application grantedgrantedCritical
Publication of JPS641162Y2publicationCriticalpatent/JPS641162Y2/ja