Isihlungi se-backwash ezenzakalelayo
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Isihlungi Se-Backwash Esisebenza Kakhulu Esisebenza Kakhulu Sokuhlanza Amanzi
Isihlungi se-Backwash esizenzakalelayo siyisihlungi esizenzakalelayo sezimboni esingahlinzeka ngezinhlobonhlobo zokusetshenziswa okuphelele ukuze kuqinisekiswe ubumsulwa nokuthembeka koketshezi oluhlungiwe.
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Isihlungi Se-backwash Esizenzakalelayo Ngokugcwele Esizihlanzayo
Ukulawula okuzenzakalelayo kwe-PLC, Akukho Ukungenelela Kwezandla, Yehlisa Isikhathi Sokuphumula