8 10 12 Inch Dth Rock Big Size Water Well Drilling Hammer And Bits .
Company strength? .. Drill rock type: Granite, Marble, Limestone, Basalt, ect. . 5, Product life, We select high strength structure alloy steel and carbides with best quality to ensure the drill . Strict production process . we have served a number of large mining projects including blast holes, anchoring geothermal bore holes.Live Chat