Thaum yuav cov pwm pwm, lawv feem ntau muab faib ua ob hom: pwm pwm puag thiab tsis yog pwm pwm. Peb tuaj yeem nkag siab tau yooj yim tias cov qauv pwm hauv paus yog ib txwm muaj thiab muaj qib siab ntawm kev tsim qauv
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,
