Railway Castings, as key load-bearing factors in railway devices, have their inner microstructure immediately identifying the overall performance and repair daily life. Metallographic Evaluation, by revealing the microstructure characteristics of products, supplies a immediate basis for the standard assessment of observe castings. one.Specialized ways of metallographic Evaluation one.... https://www.geto.space/post/72794_this-is-the-periodic-wear-on-the-top-surface-of-the-rail-resembling-waves-when-t.html