Ukukhutshwa kweplastiki, okufana neeprofayili ze-UPVC (i-polyvinyl chloride eqinile) okanye iimveliso zemibhobho, ubukhulu becala zenziwe ngokuxuba, ukusetyenzwa kwe-extrusion, ukubunjwa, ukukhupha, kunye nokusikwa kwe-PVC ye-resin kunye nezongezelelo ezinxulumene nazo.Izinto ezichaphazela ukusebenza kweemveliso zibandakanya i...
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