QL50-130mm DTH Hammer Drill Button Bit for Water Well Drilling The QL50-130mm DTH (Down-the-Hole) drill bit is an industrial-grade drill designed specifically for use with the 5-inch QL50 impactor. ...Xem thêm
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QL50-130mm DTH Hammer Drill Button Bit with Tungsten Carbide Teeth for High-Pressure Water Well Drilling