Vim nws cov cuab yeej zoo heev, aramid xov paj tau siv dav hauv ntau qhov chaw:
Aerospace: siv los tsim cov khoom siv dav hlau thiab cov khoom tseem ceeb ntawm lub dav hlau.
Kev tsim tsheb: siv los tsim cov khoom siv ua haujlwm siab thiab cov khoom siv xws li lub rooj zaum.
Hluav taws xob thiab hluav taws xob: siv los tsim cov khoom siv hluav taws xob kub thiab cov khoom siv ntxiv rau cov xov hlau thiab cables.
Cov khoom siv ncaws pob: siv los tsim cov khaub ncaws ua kis las thiab khoom siv.
