1、Polystyrene (PS). ʻIke maʻamau ʻo ia ʻo ka lāʻau paʻa paʻa, he ʻano waihoʻoluʻu, ʻaʻole, ʻālohilohi nā waiwai polystyrene granular e like me kēia a, nā waiwai optical maikaʻi b, nā waiwai uila maikaʻi loa c, kaʻina hana maʻalahi d. ʻO nā waiwai kala maikaʻi e. ʻO ka pōʻino nui loa ʻo ka brittleness f, ʻo ia ...
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