The picture shows the bottom of the DMU type internal combustion double-layer EMU. The structure speed of this type of EMU is only 120 kilometers, and the space under the car is too narrow. The maintenance is difficult. The picture shows the bottom of the DMU type internal combustion double-layer EMU. The construction speed of the EMU Only 120 kilometers, and the space under the car is too narrow, making maintenance difficultbinance jex bitcoin