Kab-pov thawj net yog zoo li lub qhov rais screen, nrog lub zog tensile siab, UV tsis kam, kub tsis kam, dej tsis kam, corrosion kuj, laus kuj thiab lwm yam khoom, uas tsis yog-tshuaj lom thiab tasteless, lub neej kev pab cuam yog feem ntau 4-6 xyoo, mus txog rau 10 xyoo.Nws tsis tsuas yog muaj qhov zoo ntawm sh...
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