Bogie for subway practice I. Core Technological Demands: Safety is the sole Criterion Bogie frame castings will not be standard Solid iron sections. They bear the complete excess weight of the car or truck entire body and travellers and repeatedly withstand many impacts and vibrations through the track. Their complex https://www.bondhuplus.com/post/954416_with-the-development-of-big-data-the-internet-of-things-and-artificial-intellige.html