Tom qab ua tiav kev tsim cov tsheb pwm pwm, los ntawm kev sim pwm, kho pwm, kom tau raws li cov neeg siv khoom xav tau ntawm lub xeev zoo tshaj.
Tom qab cov pwm ua kom tiav, peb siv butter rau ntawm cov khoom pwm, txau cov xim uas cov neeg siv xav tau ntawm sab nrauv, thiab thaum kawg tso pwm rau ntawm lub tais ntoo thiab qhwv nws.
Cov txheej txheem pwm tau npaj rau kev xa khoom, tos kom thauj khoom thiab thauj mus los.
