DTH Hammer, DTH Bit, Reverse Circulation Hammer manufacturer / supplier in China, offering DHD340 / Cop44 Rock Drilling DTH Bit for 4inch DTH Hammer, 4inch DTH Hammer for Rock Drilling (DTH bit QL40, M40, SD4, DHD340, COP44, CD45), Mission50 DTH Bit Shank for High Air Pressure Rock Drilling 5inch DTH Hammer and so on.
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