Railway Castings, as important load-bearing parts in railway programs, have their interior microstructure specifically deciding the general performance and repair life. Metallographic Examination, by revealing the microstructure characteristics of supplies, supplies a direct basis for the standard assessment of track castings. one.Specialized ways of metallographic Examination one.1 M... http://www.mysportsgo.com/profile/okok0972/action_id/1513133/show_comments/1