Kraft daim ntawv yog ib daim ntawv los yog cov ntawv ua los ntawm cov ntaub so ntswg uas ua los ntawm cov txheej txheem kraft ntawv. Vim cov txheej txheem kraft daim ntawv, cov ntawv kraft thawj muaj toughness, dej tsis kam, tsim kua muag, thiab daj xim av. Cowhide pulp muaj xim tsaus dua li lwm cov ntoo pulp, tab sis tuaj yeem b ...
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