cop54, mission50, xl5, dhd54
Nitriding Treatment
Forging
High-Quality Hard Alloy, Best Quality Steel
Soft-Hard Formation
Ore Mining, Coal Mining, Well Drilling
Rock Drilling, Core Mining, Well Drilling
Small Hole Drilling, Gas Deep Hole Drilling, Boreh
Blue, Golden, Black, Red, Customize
China Made DTH Hammer Bit HD55A Drill Bit
Standard Export Packing.
cop54, mission50, xl5, dhd54