Bogie for subway teach I. Main Technological Demands: 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 a variety of impacts and vibrations with the keep track of. https://www.malikmobile.com/story/191997-with-the-development-of-big-data-the-internet-of-things-and-artificial-intellige.html