武装热带钢连轧机F4~F7精轧机工作辊全密封四列圆锥滚子轴承国产化
무장열대강련알궤F4~F7정알궤공작곤전밀봉사렬원추곤자축승국산화
Domestic Manufacture for Full Seal Four Row Tapered Roller Bearing Used on Opera ting Roller of F4-F7 Precision Mill of Continuous Hot Rolling Mill