1. Thaum tsim pwm, pwm pem hauv ntej yuav tsum xub tshwm sim 0.05-0.1mm kom yooj yim rau cua tshuab thiab tiv thaiv cov khoom los ntawm kev lo rau pem hauv ntej pwm;
2. Qhov chaw haum ntawm qhov inlay thiab columbium yuav tsum yog hauv av nrog cov grooves, nrog rau qhov tob ntawm 0.015mm;
3. Kev thauj dej ntawm tag nrho cov pwm pwm yuav tsum tsim nyog thiab txaus, nrog rau cov hauv paus ntsiab lus ntawm ntau npaum li qhov ua tau, thiab txhua qhov ntxig yuav tsum tau thauj tag nrho nrog dej;
4. Xaiv cov khoom pwm tsim nyog raws li cov qauv khoom, cov yam ntxwv ntawm cov khoom siv raw, thiab kom muaj nuj nqis ntawm npias. Thaum xaiv cov khoom loj, nws yog ib qho tseem ceeb rau dais
