Pwm Kev Xeem lossis Kev Xeem

Puas yog sampling pwm tsim nyog? Feem ntau, yog pom tshwm tuaj pwm, qhov sampling yog qhov tsis tseemceeb. Vim tias tsis muaj EPA los sis lwm lub teb chaws muaj kev txwv rau pwm los yog cov pwm mog, kev kuaj tsis tuaj yeem siv los txheeb xyuas lub tuam tsev ua raws kev cai lij choj nrog tsoomfwv. Kev ntom ntom ntws tawm yuav pab tau los txiav txim seb thaj chaw puas tau tu los yog kho dua. Kev piv txwv rau cov pwm yuav tsum yog cov kws kho mob uas muaj kev paub tshwj xeeb hauv kev tsim cov txheej txheem pwm, cov qauv kev sib tw thiab kev txhais cov ntsiab lus. Kev ntsuam xyuas yuav tsum ua raws nraim li kev tshawb fawb pom zoo los ntawm American Industrial Cleaner Association (AIHA), American Conference ntawm tsoom fwv Industrial Hygienists (ACGIH), lossis lwm cov koom haum ua haujlwm.