Nrog rau kev txhim kho kev lag luam tas mus li, cov khoom siv vuam, ua ib qho ntawm cov ncej ntawm kev lag luam niaj hnub tsim, ua lub luag haujlwm tseem ceeb. Los ntawm kev tsim tsheb mus rau aerospace, los ntawm kev tsim vaj tsev mus rau cov khoom siv hluav taws xob, cov khoom siv vuam ua lub luag haujlwm tseem ceeb ...
Nyeem ntxiv