Cov ntaub ntawv qauv qauv
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Cov Khoom Siv Qauv Hloov Ntim
Kev Ntim NtimYog laminated los ntawm cov yeeb yaj kiab sib txawv, lub hom phiaj yog los muab kev tiv thaiv sab hauv ntawm oxidation, noo noo, lub teeb, ntxhiab tsw lossis kev sib xyaw lossis kev sib txuas ntawm cov no. Rau cov qauv siv cov khoom siv uas nquag siv los ntawm txheej sab nraud, txheej nruab nrab, thiab sab hauv txheej, inks thiab cov nplaum.