Bogie for subway teach I. Main Technical Necessities: Safety is the Only Criterion Bogie frame castings are usually not normal Solid iron sections. They bear the entire bodyweight with the auto body and passengers and constantly stand up to a variety of impacts and vibrations with the keep track of. https://talkitter.com/post/456844_with-the-development-of-big-data-the-internet-of-things-and-artificial-intellige.html