... diffluence principle, small load, no easy broken; With electromotor, reduce the air consume; Air motor drive reducer and track link to ... tapered drilling rod easily to joint and discharge. Compare with the same efficiency drilling rig, FYMQ100D is light, small, easily ... and TYMQ130D anchoring type down the hole drill: the feeding force is the same with FYMQ100D, increase the torque. anchoring type down ...