Mutsara wekuvheneka waigona kubata waya dzepasi kabhoni simbi ine choto chekuwedzera kana waya dzesimbi dzakakwira pasina kupisa.Isu tine ese PAD yekupukuta system uye yakazara-otomatiki N2 yekupukuta sisitimu yekugadzira akasiyana coating uremu zvigadzirwa zvewaya.