Bogie for subway teach I. Main Complex Specifications: Security is the sole Criterion Bogie frame castings will not be standard Solid iron areas. They bear all the body weight with the motor vehicle human body and passengers and continuously endure many impacts and vibrations within the observe. Their specialized specifications https://www.friend007.com/post/558827_this-is-the-periodic-wear-on-the-top-surface-of-the-rail-resembling-waves-when-t.html