... hot roling machine,(1)100,000-500,000ton wire,bar,rod material in continious, semicontinous roll production line.(2)2hi,4hi of cold ... apparatus of steel rolling: (1)100,000-600,000ton wire,bar,rod material in continious, semicontinous roll production line. (2)2-hi, 4 ... apparatus of steel rolling: (1)100,000-600,000ton wire,bar,rod material in continious, semicontinous roll production line. (2)3-hi, 6 ...