Npuag tsev
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Duav rau nyuj yaj tshis
Duav yog ib qho khoom tseem ceeb ntawm cov cuab yeej ntau lawm rau kev ua tawv thiab tawv ntub ua. Nws lub hom phiaj yog ua kom ua cov txheej txheem xws li soaking, txwv, tso quav, enzyme soften thiab tanning ntawm tawv nrog qee qhov kub.
