Core Drilling Rig, Diamond Core Bit, PDC Bit manufacturer / supplier in China, offering Nq Hq Diamond Impregnated Core Bits for Core Drilling Stone Hard Rock Geological Drilling Accessories Core Drill Bits, 130m Handheld Water Well Driller 3kw-4kw Electric Water Well Drilling Rig for Farm & Construction, Portable 3kw-7.5kw Electric Water Well Drilling Rig 10-35cm Hole Diameter 130m Depth Rotary Drilling for Soil & Construction and so on.