Dhd 3.5 340 350 360 380 Dth Rock Drill Bit For Quarry ...
DHD 3.5 340 350 360 380 DTH rock drill bit for quarry mining water well drilling. Product Description. DTH rock drill bits are the tools of cutting rock. Sinodrills DTH bits are made of superior quality alloy steel which is made by Timken in U.S.
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