Isibini ngunxibelelwano phakathi kombhobho wentsimbi kunye nombhobho wentsimbi. Zintathu iindidi zobalo-mbini, ezizezi, isibini se-Angle, isibini esijikelezayo, kunye nesibini esitshatileyo.
I-1. Isibini se-Angle yasekunene: isetyenziselwa ukunxibelelana kwemibhobho yentsimbi ethe nkqo, exhomekeke kwingqumbo phakathi kwesibini kunye nemibhobho yentsimbi yokudlulisela umthwalo.
2. Isibini esijikelezayo: isetyenziselwa ukunxibelelana kwemibhobho yentsimbi nganye kuyo nayiphi na i-angle
I-3. Isibini esitshatileyo: isetyenziselwa uqhagamshelo lwe-butt lwemibhobho yentsimbi ezimbini.
IXESHA LOKUQALA: APR-11 ukuya ku-1123