... ,000-500,000ton wire,bar,rod material in continious, semicontinous roll production line.(2)2hi,4hi of cold and hot boards rolling mill ... ,000-600,000ton wire,bar,rod material in continious, semicontinous roll production line. (2)2-hi, 4-hi and many roller cold and ... ,000-600,000ton wire,bar,rod material in continious, semicontinous roll production line. (2)3-hi, 6-hi and many roller cold , hot ...