115mm 120mm Spherical Rock Drill Bit Rod Oil And
The threaded drill bits are equiped with the hydraulic drilling jumbo and used for crush rock, which are widely used in tunnel construction, large scale mine (open and underground) and large section tunnel advance in metal mine.2.Geotools can make all kinds of threaded drill bits, that include R25, R28, R32, R35, R38, T38, T45, T51, ST58, HT60, ST68 and so on, and the head diameter range from 41mm to …
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