Hauv kev ua liaj ua teb niaj hnub no, xaiv cov khoom siv npog zoo rau tsev cog khoom yog qhov tseem ceeb. Raws li cov ntaub ntawv tshiab tshaj plaws, yas zaj duab xis, polycarbonate (PC) panels, thiab iav account rau 60%, 25%, thiab 15% ntawm ntiaj teb no daim ntawv thov tsev cog khoom, feem. Sib txawv npog lev...
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