PVC cov kav dej

Nyob rau hauv lub pipeline system, CPVC (chlorinated polyvinyl chloride) thiab UPVC (unplasticized polyvinyl chloride), raws li ob tus qauv yas kav nrog corrosion kuj, teeb, yooj yim ntawm installation, thiab lwm yam zoo, tau siv dav. Txawm li cas los,…