Izisetshenziswa zokwelashwa kwangaphambili
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Izikrini ze-sludge, i-Grit Separation kanye neyunithi yokwelapha
Iyunithi ye-HSF iqukethe isikrini esiyisikulufu, ithange lokuthungatha, isikulufu sokukhipha isihlabathi kanye nesikhuhla samafutha ongasikhetha.
