Tam sim no, daim ntawv thov ntawm pwm koom nrog txhua yam khoom (xws li tsheb, aerospace, khoom siv txhua hnub, kev sib txuas lus hluav taws xob, cov khoom siv kho mob thiab cov khoom siv, thiab lwm yam), tsuav yog cov khoom lag luam ntau yuav tsim los ntawm pwm,
