Daim ntawv thov: Sab Hauv Hniav Kom Zoo Nkauj

Qhov tseem ceeb ntawm daim ntawv thov: Kev tsim cov tshuab loj, tsis tshua muaj cov txheej txheem tom qab machining, qib siab ntawm cov tsos tsis muaj txiv kab ntxwv tev-zoo li, pitting thiab lwm yam teeb meem

Daim ntawv thov: Vaub kib

Qhov tseem ceeb ntawm daim ntawv thov: Kev ua ntau lawm, one-one molding, tsawg dua kev ua haujlwm, cov khoom siv yog xaiv tau