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Cov ntawv pov thawj iav
Cov ntawv pov thawj iav hais txog txhua hom iav uas tau tsim los sawv tawm tsam tiv thaiv los ntawm cov mos txwv feem ntau. Hauv kev lag luam nws tus kheej, iav no raug hu ua iav tiv taus cov mos txwv, vim tias tsis muaj txoj hauv kev los tsim cov iav qib cov neeg siv khoom uas tuaj yeem ua pov thawj tiv thaiv cov mos txwv. Muaj ob hom tseem ceeb ntawm cov ntawv pov thawj iav: uas siv cov iav laminated txheej rau saum nws tus kheej, thiab qhov uas siv polycarbonate thermoplastic.
