Cov hauv qab no yog cov txheej txheem rau khaws cov yas pwm:
Ua ntej: Ntxuav cov pwm sab hauv thiab sab nraud nrog cov yas lossis roj hmab pas nrig tom qab siv los tiv thaiv cov cement seem ntawm seem. Tsis txhob siv cov khoom siv hlau tawv los ntxuav nws, vim qhov no tuaj yeem khawb qhov sab hauv ntawm cov pwm yas thiab cuam tshuam rau nws rov siv dua.
Thib ob: So sab hauv ntawm cov pwm yas kom huv nrog ib daim ntaub, muab ob npaug rau- xyuas seb puas muaj cov seem seem thiab xyuas kom cov pwm qhuav tag.
Thib peb: Tshem tawm cov pwm yas puas hnyav thiab muab tso rau ib sab.
Plaub: Muab cov yas pwm tsis zoo rau hauv qhov chaw qhuav, tsaus ntuj nti. Qhov zoo tshaj plaws, khaws cia rau hauv lub tsev tsis muaj qhov rais kom tsis txhob muaj hnub ci ncaj qha.
Yog tias qhov no tsis tuaj yeem ua tau, pleev xim rau lub qhov rais lossis npog lawv nrog ib daim ntaub tuaj yeem tiv thaiv tshav ntuj thiab oxidation ntau dhau ntawm cov pwm yas.
