Taper Drilling Tools, Jack Hammer, Air Leg Rock Drilling Machine manufacturer / supplier in China, offering T38/T45/T51/St58/Gt60/St68 Drifting and Tunneling Thread Drill Rod, Thread Extension Rock Drill Rods R25 R32 R38 T38 T45 T51, R25 with Hex 22X108mm Shank R32 Thread Extension Drill Rod and so on.
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