● Mov txheej txheem txaus tsim raws li rau ntawm qhov chaw; ● Mov khoom foundation kev kos thiab corollary equip parameter; ● Mov kev them nyiaj yug rau modifying cov khoom daim ntawv thov; ● Nqi nqi rau muab kho dua technology; ● sij hawm ntev technology them nyiaj yug rau daws teeb meem.
