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Priority to JP1989012248UpriorityCriticalpatent/JP2545879Y2/ja
Publication of JPH02104101UpublicationCriticalpatent/JPH02104101U/ja
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Publication of JP2545879Y2publicationCriticalpatent/JP2545879Y2/ja
Method of producing lightweight flexure resistant thin metal sheet, a set of rolls for use in cold rolling of plain sheet material, and sheet material having projection on both of its surface projection