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Priority to JP1974025283UpriorityCriticalpatent/JPS587376Y2/ja
Priority to US490745Aprioritypatent/US3913117A/en
Priority to DE2439019Aprioritypatent/DE2439019C3/de
Publication of JPS50116432UpublicationCriticalpatent/JPS50116432U/ja
Application grantedgrantedCritical
Publication of JPS587376Y2publicationCriticalpatent/JPS587376Y2/ja