Muaj ntau hom kev tsim kho pob khoom xaiv los ntawm qhov loj me, cov khoom siv kom tiav.
Peb cov neeg muag khoom thiab R & D engineer yuav ua hauj lwm nrog koj kom paub tseeb tias qhov kawg pleev txhuam yog nyob rau hauv qhov zoo tshaj plaws, nyob rau hauv txoj kab nrog koj hom.