Izici:
Inalithi yobulukhuni obukhulu, Yakhiwe ngensimbi ye-alloy tungstenIdizayinelwe ukukhiya ngokushesha futhi ibhoboze ishubhu yesiqandisiGcoba ishubhu lesiqandisi bese ubuyisela isiqandisi esidala ngokushesha.Kwenziwe ngensimbi ye-alloy efakwe ukushisa esezingeni eliphezulu ukuze iqine.