underground drilling rig 1,hydraulic system 2,crawler type 3,city construction rig 4,polular in Russian market ... 40 directional drilling rig is driven with full hydraulic system, propelled with its own crawlers. Driven with duplex zero motors, the rotator ... diesel engine, hydraulic pumps, valves, motors, reducer and key hydraulic accessories are all adopted in famous brand at home and abroad.With big ...