... operate 2.strong torque 4.competive price 20142 new design hydraulic drilling rig AKL-S-400 1.Features and advantage:(1). This ... type, mechanical drive, some hydraulic control, overall rigs, hydraulic lift..(3). Has a through hole with big diameter, drilling depth, large torque, high ... *4.15*16.7Weight (t)9.4 2012 new design hydraulic drilling rig AKL-S-400