Bogie for subway train I. Core Technological Needs: Protection is the Only Criterion Bogie frame castings will not be ordinary cast iron areas. They bear your complete excess weight in the car or truck body and passengers and constantly stand up to different impacts and vibrations with the observe. Their https://youslade.com/post/339439_with-the-development-of-big-data-the-internet-of-things-and-artificial-intellige.html