Ulwelwesi lwe-PVC luwulwelwesi olunomsebenzi wokuhlanza amanzi. Ingasusa ngempumelelo ukungcola nokungcola emanzini, okuhlanganisa okuqinile okumisiwe, i-macromolecular organic matter kanye nama-ion athile, ngokuhlolwa ngokomzimba nokuhlolwa kwamangqamuzana, ngaleyo ndlela kube ngcono...
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