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Priority claimed from JP2401379Aexternal-prioritypatent/JPH0687092B2/ja
Priority claimed from JP02401401Aexternal-prioritypatent/JP3130056B2/ja
Priority claimed from JP02401399Aexternal-prioritypatent/JP3130055B2/ja
Application filed by Showa Aluminium Co LtdfiledCriticalShowa Aluminium Co Ltd
Application grantedgrantedCritical
Publication of TW198122BpublicationCriticalpatent/TW198122B/zh