Bogie for subway coach I. Core Technological Needs: Protection is the Only Criterion Bogie frame castings are certainly not normal Solid iron sections. They bear the entire bodyweight with the auto physique and passengers and constantly stand up to several impacts and vibrations within the track. Their technical specifications revolve https://vherso.com/post/568828_rail-grinding-this-art-carried-out-amid-sparks-flying-quietly-safeguards-the-hea.html