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The “DTH” is the abbreviation of “Down The Hole” and sometimes it is also called “RAB” in some markets, and the “RAB” is short for “Rotary Air Blasting”.
SD Shank DTH Drill Bit is widely used in underground mining, quarries, hydraulic and Hydro-Power Engineering, water well drilling. Mineral exploration, anchoring hole drilling, geothermal engineering, Subway excavation, another civil engineering....