... drill 1,decent gearing speed with large rotary range. 2,piling work and drilling sampling. Small diameter piling drill,Multiple ... : 1, Decent gearing speed with large rotary range. 2, Low speed drilling with large torque is suitable for piling work ... lifting drill tooling. 4, Hydraulic feeding, easy operation, high drilling efficiency, less human efforts. 5, Compressed structure, small dimension, ...