Poyerekeza ndi zipangizo za PET ndi PP, PP idzakhala yopambana kwambiri pakuchita.1. Kusiyana ndi tanthauzo la PET (Polyethylene terephthalate) dzina la sayansi ndi polyethylene terephthalate, yomwe imadziwika kuti polyester resin, ndi utomoni.PP (polypropylene) ndi ...
Werengani zambiri