Ngokusho kokuhlelwa kwedivayisi yomjovo kanye nedivaysi yokubopha, umshini wokubumba umjovo ungahlukaniswa ube umshini wokubumba umjovo oqondile, umshini wokubumba umjovo ovundlile kanye nomshini wokubumba umjovo oyinhlanganisela ovundlile ovundlile. Namuhla, Ngizochaza ngokuyinhloko ukusebenza phakathi kwamamodeli amabili okukhulunywe ngenhla, leyo, umshini wokubumba umjovo ovundlile kanye nomshini wokubumba umjovo oqondile oqondile …