2013
After 3 years of research, our team focus on the drill and pneumatic tool started the production of DTH hammer and bits from 3'' to 12'' which include the various series such as DHD, SD, QL and MISSION.
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                After 3 years of research, our team focus on the drill and pneumatic tool started the production of DTH hammer and bits from 3'' to 12'' which include the various series such as DHD, SD, QL and MISSION.