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Priority claimed from JP3173394Aexternal-prioritypatent/JP2663859B2/ja
Priority claimed from JP6036661Aexternal-prioritypatent/JP2992977B2/ja
Application filed by Sumitomo Metal IndfiledCriticalSumitomo Metal Ind
Application grantedgrantedCritical
Publication of TW287204BpublicationCriticalpatent/TW287204B/zh