DTH( down the hole) hammer drilling, top hammer drilling,drag bit, diamond core drilling tools, core bit, core barrel, guide sleeves, polit bit, drill rod, drill tube, drill bit, casing shoe, rock bit, drilling tools, open pit, open cast, mining, qua
 

We, DVY INTERNATIONAL,（E-mail: drills(at)sinodrills.com,
MSN:wsb316(at)hotmail.com, website: http://www.sinodrills.com）are
one supplier, specializing in exporting those rock drilling equipments,
as following,
--DTH (down the hole) hammers and bits & ODEX, pilot bit, guide
sleeves, guide device;
--Diamond core drilling tools (NQ, BQ, HQ, PQ): diamond core bits,
reaming shells/reamer, reaming tools, core barrel, casing shoe;
--Top hammer drilling equipment: button bit, chisel bit, cross bit,
tapered bit, thread bit, integral drill rod, tapered rod, striking bar,
shank adapters, extension rod, drifter rod, paving rod, pick rod,
coupling sleeves, M/F speed rod, roller bit, rock bit, quarrying, and
mining equipments, hollow drill steel;
--Rock anchor drilling tools: anchor rods, anchor bits, friction bolts;
Furnace tapping tools: furnace rods, furnace bits;
--Rock drills: air-leg (jack-leg) rock drill, pneumatic rock drills,
hand-held rock drill, internal combustion rock drill, motor-driven rock
drill, open cast, open pit, surface and underground mining/quarrying,
pick hammer tools, tunneling equipment;
--Drag bits: 3-wings, 4-wings, step type and V-type;
--Mine lamp (helmet lamps).