Bogie for subway train I. Main Technical Demands: Safety is the Only Criterion Bogie frame castings are usually not regular Solid iron sections. They bear the complete body weight of your car human body and travellers and repeatedly endure many impacts and vibrations in the track. Their technical needs revolve https://www.geto.space/post/72795_in-curved-sections-or-areas-with-frequent-braking-the-surface-of-the-rail-will-d.html