Ngwa inyeaka
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Ngwaọrụ achọpụta ákwà adịghị mma
Arụmọrụ nka nka:1. Nchọpụta akpa kpara akpa2.Nchọpụta nke akwa akwa gbajiri agbajiỌrụ ntụnyere 3.Sample4. Kaa akara ebe mmebi5. Akpaaka mmepụta nke singal6.Application: enweghị ibu arọ agba obibi akpa kpara akpa