Mine car transport coal mines, ore and waste rock and other bulk materials handling vehicles narrow gauge railway in Shandong stationary tub, generally required traction locomotive or winch. Harvesters basic components: the hopper wagons tub that can be opened flat Lanzhou stationary tub, both sides of the lower trunk ports are fixed wing tub, run-time support for unloading at ports should be sufficient rigidity to prevent deformation. Tramcar narrow-gauge railway transport vehicle mines transport coal, ore and waste rock and other bulk materials, are generally required traction locomotive or winch. Harvesters basic components: the frame include car beams, buffers and axis card. Car beam is the main bearing member tramcar. In addition to gravity and traction carriages outside, in the operation to be under a lot of shock, vibration, and other additional loads. Car manufacturing special steel beams in general.