Railway Castings, as key load-bearing factors in railway units, have their interior microstructure instantly pinpointing the performance and repair existence. Metallographic analysis, by revealing the microstructure characteristics of products, supplies a direct basis for the standard assessment of observe castings. 1.Complex ways of metallographic Examination one.1 Metallographic Inv... https://www.scoop.it/topic/okok0972/p/4168348898/2025/10/10/improve-the-environment-and-passenger-experience