... . cross chisel, chisel bit, coal, mining machine cut cut gear tooth, spin and determing WaJi cut teeth, drill rod, pipe, tooth gear, ... gear of seat, the wind pipe, high strength cut teeth, engineering cut teeth, bullet head, wind, column teeth drill bit, ... komatsu, Robbins, petrochemical, Hitachi, rickmansworth island with TBM shield machine etc. Hob, scraper can also according to customer special