... ,mining ,soil ,SPT 2011 hottest ,most capable and powerful hydraulic core drill rig, HF150 Trailer Water well Borehole Drilling Rig ... ,high motive power,low cost and broad compatibility.To be provided with hydraulic control pressure feed mechanism for ... opening etc drilling engineering 2011 hottest ,most capable and powerful hydraulic core drill rig, HF150 Trailer Water well Borehole Drilling Rg ...