32mm 7 Degree 7 Button Taper Button Bit For Gold Mine Dth Drilling Rig Different rock formation and rock drills require different taper angles. For low impact rock drills and softer rock formation, a narrow ... Read More
Water Well Drill Rod API 2 7/8" IF API 2 3/8" IF 89mm 2M DTH Drill Rod Our Factory is a leading manufacturer of wireline drill rod in China. Both ISO9001: 2000 and API 5DP certificates are available for our ... Read More