Waya ndi mapulasitiki a chingwe (omwe amatchedwa kuti chingwe) ndi mitundu ya polyvinyl chloride, polyolefins, fluoroplastics, ndi mapulasitiki ena (polystyrene, polyester amine, polyamide, polyimide, polyester, etc.). Pakati pawo, polyvinyl chloride, ndi polyolefin ndizomwe zidapangitsa kuti ...
Werengani zambiri