See how train tracks are made as giant ovens turn iron into hot steel that's molded, rolled and finally cut into rails.
원문출처 : http://www.cnn.com/videos/cnnmoney/2017/06/13/india-steel-plant-manufacturing-train-tracks.cnnmoney
원문출처 : http://www.cnn.com/videos/cnnmoney/2017/06/13/india-steel-plant-manufacturing-train-tracks.cnnmoney