①Pepa-plastiki inoumbwa zvinhu. Pepa rine maitiro akanaka ekudhinda, kunaka kwemhepo kupinza, kusamira zvakanaka kwemvura, uye deformation mukubata nemvura; firimu repurasitiki rine kumira zvakanaka kwemvura uye kusimba kwemhepo, asi kusadhinda kwakashata. Mushure mekunge maviri aya asanganiswa, com...
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