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Sefa Yodziyeretsa Yodzitchinjiriza
Zosefera zodzitchinjiriza ndi mtundu wa zida zochizira madzi zomwe zimagwiritsa ntchito sefa yotchinga kuti ichotse zonyansa m'madzi, kuchotsa zinthu zoyimitsidwa ndi zinthu zina, kuchepetsa matope, kuyeretsa madzi, kuchepetsa dothi, mabakiteriya ndi algae, dzimbiri, ndi zina zambiri, kuti ayeretse madzi abwino komanso kuteteza ntchito yabwinobwino ya zida zina m'dongosolo. Imakhala ndi ntchito yosefa madzi aiwisi ndikuyeretsa zokha ndikutulutsa zosefera, ndipo njira yoperekera madzi yosasokoneza imatha kuyang'anira momwe fyulutayo imagwirira ntchito, yokhala ndi makina apamwamba kwambiri.