... based on the mature parts home and abroad. The rotary drill rig , of which the key performance specifications has reached and even ... , deserts and building groups.Main features of ZTR series rotary drill rig :1.Hydraulic retractable tracked chassis, auto lift, fold mast, and ... spiral bit, common drilling bucket, drilling bucket etc, which can drill in clay bed, gravel, pebble bed and inter mantle rock ...