2021 5'DTH Hammer and Bit - Changsha Dth Drill ...
China 5'DTH Hammer and Bit, 5inches DHD350 HD55 Cop54 204~216mm High Air Pressure DTH Hammer Drill Bi DTH Hammer Bits for Mining High Quality Durable,DHD350 HD55 Cop54 191-203mm 5inches Drill Bit Premium Quality High Pressure for Water Well Drilling by China manufacturer – Changsha Dth Drill Construction Machinery Co., Ltd.
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