Cov txheej txheem polishing yog kom tau txais daim iav ci ci zoo li txheej txheem ua haujlwm saum npoo av. Polishing yog cov txheej txheem kawg ntawm txheej txheej lossis txheej txheem ntawm npoo. Nws lub hom phiaj yog txhawm rau tshem tawm cov khoom hnav zoo uas tseem nyob rau saum npoo av tom qab txheej txheem polishing. Qhov zoo tshaj plaws polished nto yuav tsum yog daim iav zoo li saum npoo uas du, kaj lug, tsis muaj kab, tsis muaj kev pab cuam, tsis muaj qhov to, thiab tsis muaj kev cuam tshuam hlau txheej.
Sab laug ib hauv daim duab hauv qab no yog daim iav polishing, tus sab xis yog polishing zoo tib yam.
