Waya ati awọn pilasitik okun (ti a tọka si bi ohun elo okun) jẹ awọn oriṣiriṣi polyvinyl kiloraidi, polyolefins, fluoroplastics, ati awọn pilasitik miiran (polystyrene, polyester amine, polyamide, polyimide, polyester, bbl). Lara wọn, polyvinyl kiloraidi, ati polyolefin ṣe iṣiro fun opo julọ ti…
Ka siwaju