... API specification 3.Adopting advanced AC-SCR-DC technology DC Electric Drilling Rig Technical characteristics*Adopting advanced AC-SCR-DC technology ... (in)698.5952.5952.5SpeedI or II, smooth changeDrive modeIndependent electric drive or compound driveMastTypeKHeight, m4345Max. load, kN225031504500Racking board height, m24 ... -DC, one for one or one for two control DC Electric Drilling Rig