Ngokusetshenziswa okubanzi kwepayipi le-PVC (i-polyvinyl chloride) ekwakheni, ezolimo, embonini yamakhemikhali nakweminye imikhakha, isidingo semishini yokucubungula amapayipi e-PVC siyakhula. Muva nje, kwazalwa uhlobo olusha lwemishini ebizwa nge-inthanethi PVC umshini wokusika ipayipi, ...
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