Cop44 series DTH button bits,diameter 4.5"~6" using 23CrNi3Mo steel and YK05 carbide Product Description Cop series is a kind of high air pressure DTH ...
Diameter 152mm cop44 shank DTH bits , high wear resistance caibide DTH Drill Bits are produced from premium quality nickel-alloy steel for increased ....
DHD360 series dth drill bits diameter from 152~235mm for water well drilling and mining equipments DHD360 series is widely used in well drilling. In ....
HD25,Br2,series dwon the hole bits using mid air pressure fo blashing hole drilling Product Description QIDELI Thread Button Bit is made by the best ....