PVC - mtundu wa chinthu chakupepuka na chakukhora- chikugwiriskirika nchito mu mafakitale ghanandi chifukwa cha mutu wake wakusindikizga wakupambanapambana na ndondomeko yiwemi chomene yakugwilira ntchito, waliyose uyo wakugwira ntchito mwachilengiwa wangagwiliskira ntchito makina mwambura kusuzga.1 chigomezgo cha chaka chikuperekekaso kwa imwe.



