1, Polystyrene (PS). Wodziwika bwino kuti mphira wolimba, ndi wopanda mtundu, wowonekera, wonyezimira wonyezimira wa polystyrene ali motere, mawonekedwe abwino a kuwala b, zinthu zabwino kwambiri zamagetsi c, njira yosavuta yopangira d. Makhalidwe abwino opaka utoto e. Choyipa chachikulu ndi brittleness f, iye ...
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