，born for drilling.
TDD is specialized in manufacturing various DTH drilling machine and equipment and drilling tools, including drilling hammers
、matched drilling bits
、drilling rigs and drilling pipes for water wells, mines, Geothermal Sources, Physical Exploration, Natural Gas Exploitation, Foundation Piles , Photovoltaic Industries and oil industries
，TDD has been promoting productivity in drilling industry, TDD ensure the safety and stability of drilling engineering, and provide professional, efficient and reliable drilling solutions.