ka mokgwa o tshwanang, tshepahalo ya disebediswa tsa ho tsamaisa thepa e ntlafetse ho fihla ho 80% mme e ya e lebile bonyane ho 95% hore e fihlele boemong ba matjhaba.

ngalo kunjalo, kusebenta kahle kweti setjentiswa letilayisha imitfwalo lemikhulu kutfutfuke kwaya ku80% futsi kuyachubeka kuya lokungenani ku95% kuze kutsi kuhlangabetane netimiso temave ngemave.
