1. Isingeniso Sezikhwama Ezilukiwe Nobuchwepheshe Bazo Bokucubungula Izikhwama ezilukiwe zepulasitiki zenziwe ngokuyinhloko nge-polypropylene (PP), ezikhiqizwa ngokuphuma, ukudweba ngentambo, ukuluka, kanye nokwenza izikhwama. I-PP iyi-thermoplastic ecacile kancane, e-semi-crystalline enamandla aphezulu, ukuvikela okuhle, namanzi aphansi...
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