Hlau pwm hlau yog ib qho ntawm cov ntaub ntawv tseem ceeb rau kev tsim pwm. Raws li kev txhawb nqa kev lag luam pwm, lub ntiaj teb pwm kev lag luam pwm tsim kho sai, tab sis qhov zoo ntawm Tuam Tshoj cov pwm hlau tsis tuaj yeem ua tau raws li cov cai ntawm cov hlau, yog li Tuam Tshoj kev lag luam pwm pwm yuav tsum txhim kho nws cov khoom lag luam zoo. Raws li kev ntsuam xyuas ntawm cov neeg muaj feem xyuam, cov hauv qab no yuav ua kom zoo ntawm cov pwm hlau:

Ua ntej tshaj plaws, peb yuav tsum nce kev nqis peev los ntawm kev hloov tshiab pwm hlau tshawb fawb thiab kev tsim nyiaj, txhim kho cov pawg ntawm cov pwm pwm tshiab nyob rau hauv txoj kab nrog tus qauv thoob ntiaj teb, thiab txhawb kev tsim khoom; Qhov thib ob yog tsim qhov kev xaiv cov txheej txheem pwm thiab kev ua haujlwm ua tiav ntawm cov pwm hlau; Thib peb, txhim kho cov khoom siv hlau ua kom zoo, nce ntau yam ntawm cov ntsiab lus tshwj xeeb, cov khoom tsis zoo, zoo; Thib plaub, ntxiv dag zog rau daim ntawv thov ntawm kev tuag steel nto kho tshuab.

Los ntawm cov kev muaj txiaj ntsig zoo, nws ntseeg tau tias Tuam Tshoj cov pwm hlau zoo yuav ntau dua thiab siab dua, maj mam nrog cov txheej txheem qib siab thoob ntiaj teb, kom Tuam Tshoj cov pwm hlau tsis tuaj yeem tsuas yog ua tau raws li kev lag luam pwm nyob hauv kev lag luam nrog kev thov steel, tab sis kuj xa tawm txawv teb chaws, hauv cov lag luam tawm txawv teb chaws qhib qhov chaw lag luam muaj ntau dua.