Los ntawm kev siv txij nkawm tom qab, kev dag cov nyom yog zoo dua li tej yam ntuj tso nyom, tsawg kawg nws tsis tas yuav tiv thaiv tau ntau yam kev tiv thaiv, yog li cov nqi kev txuag tau txuag tau. Qhov kev pib yooj yim yog ua raws li cov lus qhia tshwj xeeb.
Raws li tus neeg tsim muaj cov nyom, tsawg kawg yog xyuas kom meej tias tsis muaj cov hlau loj, ntawm no xa mus rau hauv cov hlau hnyav xws li cadmium, lead, mercury, chromium, vanadium, selenium, arsenic, antimony, dissolubility ntawm yim hom soluble hlau xyuas, kom paub meej tias cov khoom tom qab lub koom haum tshwj xeeb.
Secondly, xyuas kom xa cov khoom ntawm cov khoom nyom, tsim nyog npaj thiab khoom pov thawj; Nws yuav tsum muaj lub cushion tuaj yeem siv los ua kom muaj kev zoo, kom nws txo tau qhov kev puas tsuaj vim los ntawm qhov siab, thiab xyuas kom cov neeg tsis muaj kev phom sij thaum qoj ib ce.
Tsis tas li ntawd, nco ntsoov tias muab cov nyom ua kom tsis muaj teeb meem, ua rau cov me nyuam ua si ntawm cov txiav nyom thiab qhov muaj feem cuam tshuam rau tus me nyuam hauv cov dej num uas xis nyob, thiab muaj ntau dua cov nplaim taws tuaj, yuav txo tau cov xwm txheej ntawm cov me nyuam lom ze lub tsev kawm ntawv hluav taws.
Tsis tas li ntawd, nws yuav tsum tau siv nws lub cev tsis muaj zog, nws hais tias nws lub cev tsis muaj zog, nws yuav tsum tau ua kom tiav ib qho zuj zus.
Rau cov kev cai ntawm cov khoom nyom nyom, tau kawg, muaj ntau ntau, cov kev cai tsis yog tsuas yog rau cov khoom cua cog turf ntau lawm manufacturers tsim, rau cov neeg siv, kuj yuav tsum tau ua raws li nruj me me, los ntawm kev siv tau cov khoom siv dag zog zoo dua.
