1. Lub tshuab ua kom cov nplaum kub yaj: Siv cov kua nplaum uas muaj viscous, coated rau ntawm lub substrate, feem ntau muaj cov khoom lamination, lub tshuab uas tuaj yeem laminating lwm lub substrate thiab cov substrate glued. (Nws yog ib hom polymer uas tsis xav tau cov kuab tshuaj, ua ...
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