Bogie for subway practice I. Main Technical Demands: Safety is the sole Criterion Bogie frame castings are usually not regular Solid iron pieces. They bear the whole fat of your vehicle entire body and passengers and repeatedly face up to many impacts and vibrations in the track. Their specialized needs https://followingbook.com/post/557446_rail-grinding-this-art-carried-out-amid-sparks-flying-quietly-safeguards-the-hea.html