... chassis1structureBearing structure2electric control systemDC IGBT chopper speed control system3F. axleEnd of boxing-style, I-beam structure, the two gap, capacity: 6.5T ... chassis1structureBearing structure2electric control systemDC IGBT chopper speed control system3F. axleEnd of boxing-style, I-beam structure, the two gap, capacity: 6.5T ...