1) Fòje 8620 matyè premyè nan ba
2) Tretman Pre-Chalè (Normalizasyon oswa Trempe)
3) Tour vire pou dimansyon ki graj
4) Hobbing spline a (anba videyo a ou ta ka tcheke kijan pou hob spline la)
5)https://youtube.com/shorts/80o4spaWRUk
6) Carburizing tretman chalè
7) Tès