Drill Pipe, Drill Rod, Diamond Bit manufacturer / supplier in China, offering Nq Hq Pq 1.5m-3m Wireline Drill Rod for Core Drilling Pipe with Material 4130 Steel, Pq3 Frontal Discharge Bit for Exploration Geology, Nq Hq Pq Bq Diamond Core Drill Bit for Rock Sampling Drilling and so on.