... in supplying quality drilling equipments for mining, quarrying, water-well drilling, tunnelling and construction for many years. Our ... etc. 2. DTH drilling tools including Air DTH hammer, Water DTH hammer, DTH bits, ODS system, etc. 3. ... 4. Rock drills including handheld rock drills, air leg rock drills, stopper, internal combustion rock drills, motor driven rock drills, hydraulic rock drills, etc. ...