Ngati mukugula foni yam'manja, zosankha zanu nthawi zambiri zimakhala silikoni, polycarbonate, pulasitiki yolimba, ndi thermoplastic polyurethane (TPU).Ngati mukudabwa kuti TPU ndi chiyani, tiyiphwanya (zowoneka).Kodi thermoplastic ndi chiyani?Monga mukudziwa, plas...
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