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2015 high quality chinese low air pressure dth button bits

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    High quality DTH hammer bit for rock drilling. ... DTH Hammer, DTH Bit, Air Pressure Drill Bit. Hunan Unimate Heavy Industry Co., Ltd. CN ... are specialized in R&D, manufacturing, and marketing for wide range of drilling tools, such as hammers, bits, and rods in DTH drilling field. Our production base is located in the Chinese Drilling Town

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