... The main technical level of Hydraulic Rock Drilling Rig, with nine patents, has remain the ... . The main technical level of Hydraulic Rock Drilling Rig, with nine patents, has remain the international advanced ... plane-8242°Pitch angle of the drilling rig-1230°Swing angle of the track frame -1212 ... °Drilling rig length1.53 m3Promote the itineraryPromote the itinerary23 ...