Spiral Drill Rod
L/C, T/T, Western Union
20000 pcs Per Month
10 - 20 days
Carton / Wooden Box or Customized
Drilling Tool
Taper Thread/ Hex. Shank
A Lot of Different Diameter
High Strength Alloy Steel
Blue, Black, Grey or Customized
Soft Coal Bed
Wear Resistant, High Performance, High Quality, Competitive Prices, High Efficiency
CNC Machining Equipment
Thermal Refining in Vacuum
Friction Welding
Prestressed Wire Winding and Welding