The main technical level of Hydraulic Rock Drilling Rig, with nine patents, has remain the international advanced ... level. The main technical level of Hydraulic Rock Drilling Rig, with nine patents, has remain the international advanced level ... -8242°Pitch angle of the drilling rig-1230°Swing angle of the track frame -1212°Drilling rig length1.53 m3Promote the itineraryPromote ...