WG6120DHA city bus 1)CCC,ISO9001,TS16949 2)Electric, ... control systemDC IGBT chopper speed control system3F. axleEnd of boxing-style, I-beam structure, the two gap, capacity: ... control systemDC IGBT chopper speed control system3F. axleEnd of boxing-style, I-beam structure, the two gap, capacity: ... and rear drum type9othersoptional centralized lubrication WG6120DHA city bus,12 m,Electric,luxury ...