Iindaba zeMveliso
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Ungakanani owaziyo malunga neeprofayili ze-PVC zogwebu
Xa iiprofayili ze-PVC ze-foam zaziswa kwi-1970s, zabizwa ngokuba "umthi wexesha elizayo," kwaye ukwakhiwa kweekhemikhali yi-polyvinyl chloride.Ngenxa yokusetyenziswa ngokubanzi kweemveliso eziqinileyo zePVC ezinogwebu eziphantsi, zinokuthatha indawo phantse zonke iimveliso ezenziwe ngamaplanga.Kwiminyaka yakutshanje, i-t...Funda ngokugqithisileyo
