DHD380,DHD360,Ql60,Mission50,Sd6,Numa120,CIR90
CE, ISO9001: 2000, API
Tungsten Carbide, High Manganese Steel
Well Drilling,Coal Mining,Quarry Drilling
Air/Sea/Express
High Performance
Down The Hole (DTH) Bit
Flat;Convex;Concave
Spherical; Ballistic; Parabolic
Wooden Box or as Customers Inquire