OIL DRILLING RIG,ZJ70DBS OEM of NOV corporation ... collecting, display, storing, printing and transfer of drilling parameters, and the function of multi-points monitoring ... explosion proof (certificated). The drillers can fitful all drilling operation parameter setting on the operating chair, the ... modeAC-DC-ACone to onedrilling rig,oil drilling rig,drill rig,rig,driling machine,oil rig,OIL DRILLING RIG