Re004, Pr52, Pr54, Re542, Re543, Re545, Re547
Low Air Pressure DTH Bit
High Carbon Steel
Well Drilling, Coal, Ore, Quarry, Construction
Mineral Exploration
Re004, Pr52, Pr54, Re542,
Flat Face Bit, Convex Face Bit, Concave Face Bit
Fast ,and Cost Efficient
Wooden, or Others