Khoankerng-oexsefng
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Khoankexng uixsefng 🔊 (Enggie: sanitation), si tihoong laang kab huiekhiebut zøxseeng ee guihai ciapchiog ee uixsefng (hygiene) sietsy, kisut, hegciar zhørsy. Zhanchviu tochi laixtea ee zuytø kab siw lahsab ee tan'ui.