... -7 EFIEngine power(KW)187undercarriage modelCAT329DTraction force(KN)420Drilling speed(rpm) 6-28Max. crowd push force(KN)180 ... and flexible, especially suitable for narrow jobsites. JVR series rotary drill rig enjoy economic, efficient, environment friendly, stable ... from Germany or Fenland famous brands. Professional construction machinery controller adjusts and controls the engine, pump, main valve ...