Yuav ua li cas kom paub qhov txawv ntawm cov thermosetting plastics thiab thermoplastic plastics?
Raws li lub npe siv tau, ib qho yog "muaj zog" thaum kub siab, yog li cov duab tsis hloov ntawm kev kub.
Ib qho yog "yas" thaum sov siab, qhov twg deformation tuaj yeem tshwm sim tau.