Kana iwe uchitengera smartphone kesi, sarudzo dzako dzezvinhu zvinowanzoita silicone, polycarbonate, purasitiki yakaoma, uye thermoplastic polyurethane (TPU).Kana iwe uchinetseka kuti TPU chii, isu tinoiputsa (nekuona).Chii chinonzi thermoplastic?Sezvaungangoziva iwe, plas ...
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