89.3mm HQ Custom NWJ Drill Rod Using Mannesmann Seamless Steel Pipe Specifications Specifications : 1. Available in all standard drilling sizes (A, B, ...
Custom 89.3mm HQ NWJ Drill Rod Using Mannesmann Seamless Steel Pipe , heat-treated Characteristic: 1. With highly and strength of resistance on the .....
Custom BQ NQ HQ PQ NWJ Drill Rod with heat-treated for drilling rig BQ NQ HQ PQ NWJ Well Rock Drill Steel Rod for Making Carbide Drill Bits Characteri...