..............page:20-22+27
..............page:28-31+34
Study on the Internal Quality of Bridge Steels Q420q Wide and Thick Slab
LI Qiang;WANG Hao;QIE Jun-mao;School of Metallurgical and Ecological Engineering;University of Science and Technology Beijing;The Rare Earth Steel Plates Company of Baotou Iron and Steel Co. Ltd.;The Thin Slab Plant of Baotou Iron and Steel Co. Ltd.;The Central Iron and Steel Research Institute;
..............page:40-45