PVC yeeb nkab vs PPR kav

Qhov sib txawv ntawm Raw Materials PPR kav yog tsim los ntawm copolymer polypropylene, hos PVC kav siv polyvinyl chloride. Qhov sib txawv ntawm ob cov khoom siv raw ua rau muaj kev ua tau zoo thiab zoo li. Piv txwv li,…