Railway Castings, as crucial load-bearing components in railway units, have their inside microstructure specifically analyzing the effectiveness and service everyday living. Metallographic Investigation, by revealing the microstructure attributes of supplies, presents a direct foundation for the quality assessment of keep track of castings. 1.Technological methods of metallographic In... https://www.reddit.com/r/TrainPorn/comments/1o2pron/rail_jointbar/