... system 2,crawler type 3,city construction rig 4,polular in Russian market underground drilling rig The HF-40 directional drilling rig is ... reliably; the mast could be adjusted for the angle of drilling holes from 8°to 22°. The overall unit is in ... .Basing on the idea of purchasing internationally, the main matching parts and auxiliary equipments, such as diesel engine, hydraulic pumps, valves ...