Siv:
Kev kub ceev thiab siab precision: ua tau zoo kis tau tuaj yeem pom tau.
Cov qauv yooj yim: yooj yim tswj, tuaj yeem khiav ruaj khov rau lub sijhawm ntev.
Kev tswj cov chaw taws teeb: Siv tshuab pneumatic yog siv los txhim kho cov qib ntawm cov khoom siv.
LANCOMING:
Tus nqi siab dua: Cov txheej txheem tsim khoom yog cov nyom thiab tus nqi yog siab dua.
Lub suab nrov thiab teeb meem cua sov: nws yog ib qho tsim nyog los teeb tsa lub tshuab cua txias kom ntseeg tau cov haujlwm ruaj khov ntawm cov khoom siv