Bogie for subway train I. Core Technological Needs: Basic safety is the only real Criterion Bogie frame castings are certainly not ordinary cast iron sections. They bear the entire bodyweight on the auto physique and passengers and continually face up to several impacts and vibrations from the track. Their technical https://www.vevioz.com/post/1839294_in-curved-sections-or-areas-with-frequent-braking-the-surface-of-the-rail-will-d.html