Dawb cardboard rau ntim luam yeeb yuav tsum muaj siab tawv, tawg kuj, smoothness thiab whiteness. Daim ntawv saum npoo yuav tsum tau tiaj tus, tsis pub muaj kab txaij, pob, pob, warping thiab deformation ntawm tiam. Raws li lub pob luam yeeb nrog dawb ...
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