DTH Drilling Bit / Rock Drilling Bit / Drilling Tool -The grades of tungsten carbide drill bit Grade Density (g/cm³) Hardness (HRA) T·R·S (N/mm2) ......
Tungsten carbide brazing sheet used for making gear cutting tools -The grades of tungsten carbide drill bit Grade Density (g/cm³) Hardness (HRA) T·R·S ...