... choice of driven mode according to your requirement: mechanical driven, combination driven, DC motor driven, AC stepless variable frequency driven.Main components ... self-propelled.4. For combination driven, DC motor driven, AC stepless variable frequency driven. drawworks and drilling floor equipments ... 2 reverseAC1 stepless variableRated power for each mud pump kW(hp)735 (1000)960 (1300)Mast ...