Muaj ob hom tseem ceeb ntawm cov iav stained, ib qho yog ua los ntawm cov kua nplaum kev lag luam los ntawm cov thev naus laus zis niaj hnub siv tshuab, thiab lwm qhov yog txheej txheem tes pleev xim. Nws tuaj yeem pleev xim rau ntawm iav pleev xim los yog pleev xim rau ntawm cov iav tsis muaj kob.
Siv iav ua cov ntaub thaiv, siv cov xim tshwj xeeb, tom qab tha xim, thiab tom qab ntawd kub taws kub, cov xim yuav tsis poob, qhov kav ntev dua, tsis txhob txhawj xeeb txog qhov corroded los ntawm acid thiab alkali, thiab nws kuj yooj yim los ntxuav. Customized, qhov loj me, xim, thiab cov qauv tuaj yeem ua raws li qhov siab, nyab xeeb thiab ntau tus kheej, tsis yooj yim los ua tib lub sijhawm. Qhov zoo dua yog cov haujlwm yooj yim thiab tus nqi qis; qhov tsis zoo yog tias nws yooj yim rau ploj thiab lub sijhawm tsis ntev.
