Xov xwm kev lag luam
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Cov nyhuv ntawm kev rhuav tshem lub nruas mos ntawm kev kho dua tshiab ntawm tanning
Tanning yog hais txog cov txheej txheem ntawm kev tshem tawm cov plaub hau thiab tsis-collagen fibers los ntawm raw hides thiab undergoing ib tug series ntawm txhua yam thiab tshuaj kho mob, thiab thaum kawg tanning lawv mus rau hauv tawv.Ntawm lawv, kev ntxhib los mos ntawm cov tawv semi-tiav yog qhov nyuaj thiab kev ntxhib los mos ...Nyeem ntxiv
