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... or threaded, diameter from 28mm to 95mm; 3. Coupling sleeves, R25, R32, R38, T38, T45, T51; 4. Down the hole hammers, similar or equal DHD...
..., well drilling and excavation side column support, etc. We can supply DTH bits from 85mm to 305mm. The main products are:Similar or equal DHD, COP and SD series hammers, our DTH bits range from 85mm, 90mm, ...