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ZJ70Rig
The drawworks and the mud pump are driven in the form of four diesel engines
ZJ50Rig
The drawworks and the mud pump are driven in the form of diesel engines
ZJ40Rig
ZJ30Rig
The power is reasonably distributed and the running cost is saved
ZJ20Rig
The ZJ20 rig is a novel hydro-mechanical driven rig