Ngwa nke tekn?z? ultrafiltration akp?kp? an? na ?gw?gw? mmiri ????? Site na ?ganihu na-aga n'ihu nke usoro ime obodo, ?n? ?g?g? nd? bi n'obodo ukwu na-abawanye ?ba, ak?r?ngwa oghere obodo na mmiri ?l? na-ag?s? akw?kw? ...