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Priority claimed from JP8430073Uexternal-prioritypatent/JPS5213731Y2/ja
Priority claimed from JP9129273Aexternal-prioritypatent/JPS5038257A/ja
Priority claimed from FI2167/74Aexternal-prioritypatent/FI55160C/en
Application filed by Japan Steel Works LtdfiledCriticalJapan Steel Works Ltd
Publication of FI751687ApublicationCriticalpatent/FI751687A/fi
Application grantedgrantedCritical
Publication of FI55162BpublicationCriticalpatent/FI55162B/en
Publication of FI55162CpublicationCriticalpatent/FI55162C/en