Muaj ntau ntau yam bores, neeg yuav siv drilling, tho txawv, lapping, honing, lathing thiab lwm yam Drilling processing.Drilling yog ib txwm ua rau bores.Drilling tshuab siv cov cuab yeej drilling los ua qhov hauv cov khoom sib txawv.Rau cov khoom sib txawv yuav siv dif ...
Nyeem ntxiv