1.Brief introductions of QZ-2D three phase drilling rig QZ-2D type portable sampling drill rig is used for geological industrial and civil buildings, bridges, railway, highway, hydro-power industry survey, geophysical exploration, advanced drilling and grouting hole drilling, embedded hole guiding, broken hole and so on. QZ-2D drilling rig has the following features: compact structure, small volume, light weight, two gears, easy to move. 2.Specifications of QZ-2D three phase drilling rig QZ-2D drilling rig End hole diameter (mm) 32-110
