... type mechanical suspension assembly.spoke bogie,bogie axle,bogie suspension axles.9 PCS of mechanical suspension.American type 2* 16T trailermechanical suspension axles1. HJ bogie&trailer axle beam ... suspension,2 axles.1, there are 3 and 4 bogie exles.2,Height:12 PC is 480mm,14 PCS is 505mm Mechanical Suspension ... for semi trailer